diff --git a/src/Utility.vcxproj b/src/Utility.vcxproj
index ecc5ac0..35197a0 100644
--- a/src/Utility.vcxproj
+++ b/src/Utility.vcxproj
@@ -194,6 +194,7 @@
     <ClCompile Include="functional\LooseMonad.ixx" />
     <ClCompile Include="functional\Monad.ixx" />
     <ClCompile Include="functional\Option.ixx" />
+    <ClCompile Include="functional\Promise.ixx" />
     <ClCompile Include="generic\Constraints.ixx" />
     <ClCompile Include="generic\Traits.ixx" />
     <ClCompile Include="main.cpp" />
diff --git a/src/Utility.vcxproj.filters b/src/Utility.vcxproj.filters
index 62f1413..5be4206 100644
--- a/src/Utility.vcxproj.filters
+++ b/src/Utility.vcxproj.filters
@@ -164,6 +164,9 @@
     <ClCompile Include="reflection\Unique.ixx">
       <Filter>헤더 파일\Reflection</Filter>
     </ClCompile>
+    <ClCompile Include="functional\Promise.ixx">
+      <Filter>헤더 파일\Functional</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <Natvis Include="..\Utility.natvis" />
diff --git a/src/functional/Promise.ixx b/src/functional/Promise.ixx
new file mode 100644
index 0000000..0c3dee5
--- /dev/null
+++ b/src/functional/Promise.ixx
@@ -0,0 +1,77 @@
+export module Utility.Promise;
+import Utility;
+import Utility.Constraints;
+
+export namespace util
+{
+	template<typename Fn, typename U>
+	struct noexcept_t
+	{
+		template<typename... Args>
+		static consteval bool Eval() noexcept
+		{
+			if constexpr (!same_as<U, void>)
+			{
+				return nothrow_invocables<Fn>;
+			}
+			else
+			{
+				return nothrow_invocables<Fn, Args...>;
+			}
+		}
+
+		template<typename... Args>
+			requires (same_as<U, void>)
+		static constexpr auto Execute(Fn&& functor, [[maybe_unused]] Args...) noexcept(noexcept(forward<Fn>(functor)()))
+		{
+			return forward<Fn>(functor)();
+		}
+
+		template<typename... Args>
+			requires (!same_as<U, void>)
+		static constexpr auto Execute(Fn&& functor, Args&&... args) noexcept(noexcept(forward<Fn>(functor)(forward<Args>(args)...)))
+		{
+			return forward<Fn>(functor)(forward<Args>(args)...);
+		}
+	};
+
+	/// <summary>
+	/// 
+	/// </summary>
+	/// <typeparam name="T">Sucess</typeparam>
+	/// <typeparam name="E">Error</typeparam>
+	/// <typeparam name="C">Cause of Defer</typeparam>
+	template<movable T>
+	class Promise
+	{
+
+	};
+}
+
+#pragma warning(push, 1)
+namespace test
+{
+#if false
+	void test_promise() noexcept
+	{
+		constexpr auto fnl0 = [](const int& v) -> int {
+			return 300;
+		};
+
+		constexpr auto fnr0 = [](int&&) -> int {
+			return 300;
+		};
+
+		Promise<int> vpromise0{};
+		const auto r0 = vpromise0 >> fnl0;
+		Promise<long long> vpromise1{};
+
+		constexpr Promise<int, void> cvpromise0{};
+
+		constexpr Promise<long long, void> cvpromise1{};
+
+		constexpr Proxy proxy0{};
+	}
+#endif // false
+}
+#pragma warning(pop)