diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..7ca395fb1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,145 @@
+# Created by https://www.toptal.com/developers/gitignore/api/java,intellij+all,gradle
+# Edit at https://www.toptal.com/developers/gitignore?templates=java,intellij+all,gradle
+
+### Intellij+all ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij+all Patch ###
+# Ignore everything but code style settings and run configurations
+# that are supposed to be shared within teams.
+
+.idea/*
+
+!.idea/codeStyles
+!.idea/runConfigurations
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
+
+### Gradle ###
+.gradle
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
+
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### Gradle Patch ###
+# Java heap dump
+*.hprof
+
+# End of https://www.toptal.com/developers/gitignore/api/java,intellij+all,gradle
\ No newline at end of file
diff --git a/HELP.md b/HELP.md
new file mode 100644
index 000000000..32e8d4719
--- /dev/null
+++ b/HELP.md
@@ -0,0 +1,27 @@
+# Getting Started
+
+### Reference Documentation
+
+For further reference, please consider the following sections:
+
+* [Official Gradle documentation](https://docs.gradle.org)
+* [Spring Boot Gradle Plugin Reference Guide](https://docs.spring.io/spring-boot/docs/3.1.2/gradle-plugin/reference/html/)
+* [Create an OCI image](https://docs.spring.io/spring-boot/docs/3.1.2/gradle-plugin/reference/html/#build-image)
+* [Spring Web](https://docs.spring.io/spring-boot/docs/3.1.2/reference/htmlsingle/#web)
+* [Spring Data JPA](https://docs.spring.io/spring-boot/docs/3.1.2/reference/htmlsingle/#data.sql.jpa-and-spring-data)
+
+### Guides
+
+The following guides illustrate how to use some features concretely:
+
+* [Building a RESTful Web Service](https://spring.io/guides/gs/rest-service/)
+* [Serving Web Content with Spring MVC](https://spring.io/guides/gs/serving-web-content/)
+* [Building REST services with Spring](https://spring.io/guides/tutorials/rest/)
+* [Accessing Data with JPA](https://spring.io/guides/gs/accessing-data-jpa/)
+
+### Additional Links
+
+These additional references should also help you:
+
+* [Gradle Build Scans – insights for your project's build](https://scans.gradle.com#gradle)
+
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 000000000..c2eeb259f
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,37 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.1.2'
+    id 'io.spring.dependency-management' version '1.1.2'
+}
+
+group = 'me.kimihiqq'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    sourceCompatibility = '17'
+}
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    testImplementation 'org.projectlombok:lombok:1.18.28'
+    compileOnly 'org.projectlombok:lombok'
+    runtimeOnly 'com.h2database:h2'
+    annotationProcessor 'org.projectlombok:lombok'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testAnnotationProcessor("org.projectlombok:lombok")
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 000000000..c1962a79e
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 000000000..37aef8d3f
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 000000000..aeb74cbb4
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,245 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 000000000..6689b85be
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 000000000..9c9e979dd
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'springboot-jpa'
diff --git a/src/main/java/me/kimihiqq/springbootjpa/SpringbootJpaApplication.java b/src/main/java/me/kimihiqq/springbootjpa/SpringbootJpaApplication.java
new file mode 100644
index 000000000..d9d6ee07c
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/SpringbootJpaApplication.java
@@ -0,0 +1,13 @@
+package me.kimihiqq.springbootjpa;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringbootJpaApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringbootJpaApplication.class, args);
+    }
+
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/customer/Customer.java b/src/main/java/me/kimihiqq/springbootjpa/domain/customer/Customer.java
new file mode 100644
index 000000000..fac662813
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/customer/Customer.java
@@ -0,0 +1,52 @@
+package me.kimihiqq.springbootjpa.domain.customer;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import me.kimihiqq.springbootjpa.exception.InvalidNameException;
+
+import java.util.regex.Pattern;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Customer {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "first_name", nullable = false, length = 50)
+    private String firstName;
+
+    @Column(name = "last_name", nullable = false, length = 50)
+    private String lastName;
+
+    @Builder
+    public Customer(String firstName, String lastName) {
+        validateName(firstName, lastName);
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public void updateName(String newFirstName, String newLastName) {
+        validateName(newFirstName, newLastName);
+        this.firstName = newFirstName;
+        this.lastName = newLastName;
+    }
+
+    private void validateName(String firstName, String lastName) {
+        String pattern = "^[a-zA-Zㄱ-ㅎ가-힣]+$";
+
+        if (!Pattern.matches(pattern, firstName)) {
+            throw new InvalidNameException("이름은 한글과 영문만 가능하며, 비어 있거나 NULL 일 수 없습니다.");
+        }
+
+        if (!Pattern.matches(pattern, lastName)) {
+            throw new InvalidNameException("성은 한글과 영문만 가능하며, 비어 있거나 NULL 일 수 없습니다.");
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/order/Item.java b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Item.java
new file mode 100644
index 000000000..de8e73cca
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Item.java
@@ -0,0 +1,41 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.Objects;
+
+@Entity
+@Table(name = "item")
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Item {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private int price;
+    private int stockQuantity;
+
+    @ManyToOne
+    @JoinColumn(name = "order_item_id")
+    private OrderItem orderItem;
+
+    @Builder
+    public Item(int price, int stockQuantity) {
+        this.price = price;
+        this.stockQuantity = stockQuantity;
+    }
+
+    public void setOrderItem(OrderItem orderItem) {
+        if (Objects.nonNull(this.orderItem)) {
+            this.orderItem.getItems().remove(this);
+        }
+
+        this.orderItem = orderItem;
+        orderItem.getItems().add(this);
+    }
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/order/Member.java b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Member.java
new file mode 100644
index 000000000..5f423ecbc
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Member.java
@@ -0,0 +1,50 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Table(name = "member")
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Member {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @Column(name = "name", nullable = false, length = 30)
+    private String name;
+
+    @Column(nullable = false, length = 30, unique = true)
+    private String nickName;
+
+    private int age;
+
+    @Column(name = "address", nullable = false)
+    private String address;
+
+    @Column(name = "description", nullable = true)
+    private String description;
+
+    @OneToMany(mappedBy = "member")
+    private List<Order> orders = new ArrayList<>();
+
+    @Builder
+    public Member(String name, String nickName, int age, String address, String description) {
+        this.name = name;
+        this.nickName = nickName;
+        this.age = age;
+        this.address = address;
+        this.description = description;
+    }
+
+    public void addOrder(Order order) {
+        order.setMember(this);
+    }
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/order/Order.java b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Order.java
new file mode 100644
index 000000000..a184b3846
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/order/Order.java
@@ -0,0 +1,59 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+@Table(name = "orders")
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Order {
+    @Id
+    @Column(name = "id")
+    private String uuid;
+
+    @Column(name = "order_datetime", columnDefinition = "TIMESTAMP")
+    private LocalDateTime orderDatetime;
+
+    @Enumerated(EnumType.STRING)
+    private OrderStatus orderStatus;
+
+    @Lob
+    private String memo;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+
+    @OneToMany(mappedBy = "order")
+    private List<OrderItem> orderItems = new ArrayList<>();
+
+    @Builder
+    public Order(String uuid, LocalDateTime orderDatetime, OrderStatus orderStatus, String memo) {
+        this.uuid = uuid;
+        this.orderDatetime = orderDatetime;
+        this.orderStatus = orderStatus;
+        this.memo = memo;
+    }
+
+    public void setMember(Member member) {
+        if(Objects.nonNull(this.member)) {
+            this.member.getOrders().remove(this);
+        }
+
+        this.member = member;
+        member.getOrders().add(this);
+    }
+
+    public void addOrderItem(OrderItem orderItem) {
+        orderItem.setOrder(this);
+    }
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderItem.java b/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderItem.java
new file mode 100644
index 000000000..a0f16349e
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderItem.java
@@ -0,0 +1,53 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+@Table(name = "order_item")
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class OrderItem {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private int price;
+    private int quantity;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "order_id")
+    private Order order;
+
+    @OneToMany(mappedBy = "orderItem")
+    private List<Item> items = new ArrayList<>();
+
+    @Builder
+    public OrderItem(int price, int quantity) {
+        this.price = price;
+        this.quantity = quantity;
+    }
+
+    public void setOrder(Order order) {
+        if (Objects.nonNull(this.order)) {
+            this.order.getOrderItems().remove(this);
+        }
+
+        this.order = order;
+        order.getOrderItems().add(this);
+    }
+
+    public void addItem(Item item) {
+        item.setOrderItem(this);
+    }
+
+}
+
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderStatus.java b/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderStatus.java
new file mode 100644
index 000000000..34e1b25d7
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/order/OrderStatus.java
@@ -0,0 +1,6 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+public enum OrderStatus {
+    OPENED, CANCELLED
+}
+
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/repository/CustomerRepository.java b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/CustomerRepository.java
new file mode 100644
index 000000000..dae6c36b7
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/CustomerRepository.java
@@ -0,0 +1,8 @@
+package me.kimihiqq.springbootjpa.domain.repository;
+
+import me.kimihiqq.springbootjpa.domain.customer.Customer;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CustomerRepository extends JpaRepository<Customer, Long> {
+}
+
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/repository/ItemRepository.java b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/ItemRepository.java
new file mode 100644
index 000000000..925db38c9
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/ItemRepository.java
@@ -0,0 +1,7 @@
+package me.kimihiqq.springbootjpa.domain.repository;
+
+import me.kimihiqq.springbootjpa.domain.order.Item;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ItemRepository extends JpaRepository<Item, Long> {
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/repository/MemberRepository.java b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/MemberRepository.java
new file mode 100644
index 000000000..6ba1541a3
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/MemberRepository.java
@@ -0,0 +1,7 @@
+package me.kimihiqq.springbootjpa.domain.repository;
+
+import me.kimihiqq.springbootjpa.domain.order.Member;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MemberRepository extends JpaRepository<Member, Long> {
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderItemRepository.java b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderItemRepository.java
new file mode 100644
index 000000000..4ca50eaa0
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderItemRepository.java
@@ -0,0 +1,6 @@
+package me.kimihiqq.springbootjpa.domain.repository;
+import me.kimihiqq.springbootjpa.domain.order.OrderItem;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface OrderItemRepository extends JpaRepository<OrderItem, Long> {
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderRepository.java b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderRepository.java
new file mode 100644
index 000000000..9aeb30a96
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/domain/repository/OrderRepository.java
@@ -0,0 +1,7 @@
+package me.kimihiqq.springbootjpa.domain.repository;
+
+import me.kimihiqq.springbootjpa.domain.order.Order;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface OrderRepository extends JpaRepository<Order, Long> {
+}
diff --git a/src/main/java/me/kimihiqq/springbootjpa/exception/InvalidNameException.java b/src/main/java/me/kimihiqq/springbootjpa/exception/InvalidNameException.java
new file mode 100644
index 000000000..56dcbcdb3
--- /dev/null
+++ b/src/main/java/me/kimihiqq/springbootjpa/exception/InvalidNameException.java
@@ -0,0 +1,7 @@
+package me.kimihiqq.springbootjpa.exception;
+
+public class InvalidNameException extends RuntimeException {
+    public InvalidNameException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
new file mode 100644
index 000000000..a8a7f784e
--- /dev/null
+++ b/src/main/resources/application.yml
@@ -0,0 +1,15 @@
+spring:
+  h2:
+    console:
+      enabled: true
+  jpa:
+    generate-ddl: true
+    database: H2
+    show-sql: true
+    open-in-view: false
+    properties:
+      hibernate:
+        dialect: org.hibernate.dialect.H2Dialect
+        query.in_clause_parameter_padding: true
+        hbm2ddl:
+          auto: create-drop
diff --git a/src/test/java/me/kimihiqq/springbootjpa/SpringbootJpaApplicationTests.java b/src/test/java/me/kimihiqq/springbootjpa/SpringbootJpaApplicationTests.java
new file mode 100644
index 000000000..0ddbd377c
--- /dev/null
+++ b/src/test/java/me/kimihiqq/springbootjpa/SpringbootJpaApplicationTests.java
@@ -0,0 +1,13 @@
+package me.kimihiqq.springbootjpa;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringbootJpaApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}
diff --git a/src/test/java/me/kimihiqq/springbootjpa/domain/customer/CustomerRepositoryTest.java b/src/test/java/me/kimihiqq/springbootjpa/domain/customer/CustomerRepositoryTest.java
new file mode 100644
index 000000000..575fac053
--- /dev/null
+++ b/src/test/java/me/kimihiqq/springbootjpa/domain/customer/CustomerRepositoryTest.java
@@ -0,0 +1,113 @@
+package me.kimihiqq.springbootjpa.domain.customer;
+
+import me.kimihiqq.springbootjpa.domain.repository.CustomerRepository;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import java.util.List;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DataJpaTest
+class CustomerRepositoryTest {
+
+    @Autowired
+    CustomerRepository customerRepository;
+
+    static Customer customer;
+    static Customer customer2;
+
+    @BeforeAll
+    public static void setUp() {
+        customer = Customer.builder()
+                .firstName("재석")
+                .lastName("유")
+                .build();
+        customer2 = Customer.builder()
+                .firstName("명수")
+                .lastName("박")
+                .build();
+    }
+
+    @AfterEach
+    void tearDown() {
+        customerRepository.deleteAll();
+    }
+
+    @DisplayName("고객 정보 저장 테스트")
+    @Test
+    public void testSaveCustomer() {
+        // Given
+        Customer savedCustomer = customerRepository.save(customer);
+
+        // Then
+        assertThat(savedCustomer.getId()).isNotNull();
+        assertThat(savedCustomer.getFirstName()).isEqualTo("재석");
+        assertThat(savedCustomer.getLastName()).isEqualTo("유");
+    }
+
+    @DisplayName("고객 이름 변경 테스트")
+    @Test
+    public void testUpdateCustomerName() {
+        // Given
+        Customer savedCustomer = customerRepository.save(customer);
+
+        // When
+        savedCustomer.updateName("산슬", "유");
+        customerRepository.save(savedCustomer);
+
+        // Then
+        Customer updatedCustomer = customerRepository.findById(savedCustomer.getId()).orElse(null);
+        assertThat(updatedCustomer.getFirstName()).isEqualTo("산슬");
+        assertThat(updatedCustomer.getLastName()).isEqualTo("유");
+    }
+
+    @DisplayName("고객 ID로 찾기 테스트")
+    @Test
+    public void testFindCustomerById() {
+        // Given
+        Customer savedCustomer = customerRepository.save(customer);
+
+        // When
+        Customer foundCustomer = customerRepository.findById(savedCustomer.getId()).orElse(null);
+
+        // Then
+        assertThat(foundCustomer).isNotNull();
+        assertThat(foundCustomer.getId()).isEqualTo(savedCustomer.getId());
+        assertThat(foundCustomer.getFirstName()).isEqualTo("재석");
+        assertThat(foundCustomer.getLastName()).isEqualTo("유");
+    }
+
+    @DisplayName("모든 고객 찾기 테스트")
+    @Test
+    public void testFindAllCustomers() {
+        // Given
+        Customer savedCustomer = customerRepository.save(customer);
+        Customer savedCustomer2 = customerRepository.save(customer2);
+
+        // When
+        List<Customer> customers = customerRepository.findAll();
+
+        // Then
+        assertThat(customers).containsExactlyInAnyOrder(savedCustomer,savedCustomer2);
+    }
+
+    @DisplayName("고객 ID로 삭제 테스트")
+    @Test
+    public void testDeleteCustomerById() {
+        // Given
+        Customer savedCustomer = customerRepository.save(customer);
+
+        // When
+        customerRepository.deleteById(savedCustomer.getId());
+        Optional<Customer> deletedCustomer = customerRepository.findById(savedCustomer.getId());
+
+        // Then
+        assertThat(deletedCustomer).isEmpty();
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/me/kimihiqq/springbootjpa/domain/order/OrderPersistenceTest.java b/src/test/java/me/kimihiqq/springbootjpa/domain/order/OrderPersistenceTest.java
new file mode 100644
index 000000000..5d4084e9f
--- /dev/null
+++ b/src/test/java/me/kimihiqq/springbootjpa/domain/order/OrderPersistenceTest.java
@@ -0,0 +1,106 @@
+package me.kimihiqq.springbootjpa.domain.order;
+
+import me.kimihiqq.springbootjpa.domain.repository.ItemRepository;
+import me.kimihiqq.springbootjpa.domain.repository.MemberRepository;
+import me.kimihiqq.springbootjpa.domain.repository.OrderItemRepository;
+import me.kimihiqq.springbootjpa.domain.repository.OrderRepository;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@DataJpaTest
+class OrderPersistenceTest {
+    @Autowired
+    private OrderRepository orderRepository;
+
+    @Autowired
+    private MemberRepository memberRepository;
+
+    @Autowired
+    private OrderItemRepository orderItemRepository;
+
+    @Autowired
+    private ItemRepository itemRepository;
+
+    private Member member;
+    private Order order;
+    private OrderItem orderItem;
+    private Item item;
+
+    @BeforeEach
+    void setUp() {
+        member = Member.builder()
+                .name("유재석")
+                .nickName("유산슬")
+                .age(30)
+                .address("서울시 강남구")
+                .description("A good member")
+                .build();
+
+        order = Order.builder()
+                .uuid("123")
+                .orderDatetime(LocalDateTime.now())
+                .orderStatus(OrderStatus.OPENED)
+                .memo("This is a test order")
+                .build();
+
+        orderItem = OrderItem.builder()
+                .price(100)
+                .quantity(2)
+                .build();
+
+        item = Item.builder()
+                .price(50)
+                .stockQuantity(100)
+                .build();
+
+        member = memberRepository.save(member);
+        order = orderRepository.save(order);
+        orderItem = orderItemRepository.save(orderItem);
+        item = itemRepository.save(item);
+
+        member.addOrder(order);
+        order.addOrderItem(orderItem);
+        orderItem.addItem(item);
+    }
+
+    @AfterEach
+    void tearDown() {
+
+        itemRepository.deleteAll();
+        orderItemRepository.deleteAll();
+        orderRepository.deleteAll();
+        memberRepository.deleteAll();
+    }
+
+    @Test
+    void 양방향관계_저장() {
+
+        assertNotNull(order.getMember());
+        assertEquals(1, order.getOrderItems().size());
+        assertEquals(1, orderItem.getItems().size());
+        assertEquals(member.getName(), order.getMember().getName());
+        assertEquals(item.getPrice(), orderItem.getItems().get(0).getPrice());
+    }
+
+    @Test
+    void 객체그래프탐색을_이용한_조회() {
+
+        Member savedMember = memberRepository.findById(member.getId())
+                .orElseThrow(() -> new RuntimeException("Member not found"));
+
+        assertFalse(savedMember.getOrders().isEmpty());
+
+        Order savedOrder = savedMember.getOrders().get(0);
+        assertFalse(savedOrder.getOrderItems().isEmpty());
+
+        OrderItem savedOrderItem = savedOrder.getOrderItems().get(0);
+        assertFalse(savedOrderItem.getItems().isEmpty());
+    }
+}
\ No newline at end of file