diff --git a/WarhoundConsole/Program.cs b/WarhoundConsole/Program.cs
index 11d9691..8acf212 100644
--- a/WarhoundConsole/Program.cs
+++ b/WarhoundConsole/Program.cs
@@ -20,7 +20,17 @@ namespace WarhoundConsole
 
         private static void MainInternal(string[] args)
         {
-            Singleton.I.Initialize();
+            Singleton.I.Initialize(new());
+
+            bool exitRequested = Singleton.I.ExitRequested;
+            while (!exitRequested)
+            {
+
+
+                exitRequested = Singleton.I.ExitRequested;
+            }
+
+            // Graceful shutdown
         }
     }
 }
diff --git a/WarhoundConsole/Singleton.cs b/WarhoundConsole/Singleton.cs
index 6507889..97daf71 100644
--- a/WarhoundConsole/Singleton.cs
+++ b/WarhoundConsole/Singleton.cs
@@ -2,17 +2,56 @@
 {
     public sealed class Singleton
     {
+        public sealed class InitializeParams
+        {
+            // FILL SOMETHING
+        }
+
         public static Singleton I => i ??= new();
         private static Singleton? i = null;
 
+        private bool isInitialized;
+
+        public bool ExitRequested { get; private set; }
+
         private Singleton()
         {
-
+            this.isInitialized = false;
+            this.ExitRequested = false;
         }
 
-        public void Initialize()
+        public bool Initialize(InitializeParams initializeParams)
         {
+            try
+            {
+                if (this.isInitialized)
+                {
+                    throw new InvalidOperationException("이미 초기화된 싱글톤");
+                }
 
+                if (initializeParams == null)
+                {
+                    throw new ArgumentNullException(nameof(initializeParams));
+                }
+
+                this.InitializeInternal(initializeParams);
+            }
+            finally
+            {
+                this.isInitialized = true;
+            }
+
+            return true;
+        }
+
+        private void InitializeInternal(InitializeParams initializeParams)
+        {
+            // DO SOMETHING
+        }
+
+        public void Exit()
+        {
+            this.ExitRequested = true;
         }
     }
 }