diff --git a/gifs/kakao.gif b/gifs/kakao.gif
index 79005cd6..1e910d27 100644
Binary files a/gifs/kakao.gif and b/gifs/kakao.gif differ
diff --git a/src/app/_components/AuthInitializer.tsx b/src/app/_components/AuthInitializer.tsx
index 6aaf306a..4c5c13d9 100644
--- a/src/app/_components/AuthInitializer.tsx
+++ b/src/app/_components/AuthInitializer.tsx
@@ -1,5 +1,7 @@
 'use client';
 
+import { useEffect } from 'react';
+
 import { useUser } from '@/domain/Auth/hooks/useUser';
 
 /**
@@ -10,7 +12,12 @@ import { useUser } from '@/domain/Auth/hooks/useUser';
  * 이 컴포넌트는 UI를 렌더링하지 않습니다.
  */
 export default function AuthInitializer() {
-  useUser();
+  const { refetch } = useUser(); // 쿼리 객체를 받아서
+
+  useEffect(() => {
+    // 앱 로드시 강제로 한번 요청 실행
+    refetch();
+  }, [refetch]);
 
   return null;
 }
diff --git a/src/domain/Auth/hooks/useUser.ts b/src/domain/Auth/hooks/useUser.ts
index c57c055d..2656d6ca 100644
--- a/src/domain/Auth/hooks/useUser.ts
+++ b/src/domain/Auth/hooks/useUser.ts
@@ -57,7 +57,8 @@ export const useUser = () => {
     queryKey: ['user', 'me'],
     queryFn: getMe,
     retry: 1,
-    staleTime: 1000 * 60 * 5,
+    refetchOnWindowFocus: true,
+    refetchOnReconnect: true,
   });
 
   // 2. useEffect를 사용하여 쿼리 결과에 따른 부가 작업을 처리합니다.
diff --git a/src/domain/Auth/utils/setAuthCookies.ts b/src/domain/Auth/utils/setAuthCookies.ts
index 943f5834..87c76406 100644
--- a/src/domain/Auth/utils/setAuthCookies.ts
+++ b/src/domain/Auth/utils/setAuthCookies.ts
@@ -35,9 +35,8 @@ export default function setAuthCookies<T>(
     sameSite: 'lax',
     path: '/',
 
-    // maxAge: 60 * 60, //! 테스트를 위해 15초로
-    maxAge: 10,
-
+    maxAge: 60 * 60,
+    // maxAge: 10,
   });
 
   response.cookies.set({
diff --git a/src/middleware.ts b/src/middleware.ts
index 882a8196..ff329eed 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -127,6 +127,7 @@ export async function middleware(request: NextRequest) {
           headers: {
             'Content-Type': 'application/json',
             Authorization: `Bearer ${refreshToken}`,
+            Cookie: `refreshToken=${refreshToken}`,
           },
         },
       );
@@ -147,14 +148,15 @@ export async function middleware(request: NextRequest) {
           signal: AbortSignal.timeout(30000),
         });
 
-        return setAuthCookies(
-          new NextResponse(response.body, {
-            status: response.status,
-            statusText: response.statusText,
-            headers: response.headers,
-          }),
-          tokens,
-        );
+        const responseText = await response.text();
+
+        const finalResponse = new NextResponse(responseText, {
+          status: response.status,
+          statusText: response.statusText,
+          headers: response.headers,
+        });
+
+        return setAuthCookies(finalResponse, tokens);
       } else {
         console.log('[Middleware] Refresh Token 만료 또는 갱신 실패');
       }
diff --git a/src/shared/libs/apiClient.ts b/src/shared/libs/apiClient.ts
index 598ef31e..1ab7e93a 100644
--- a/src/shared/libs/apiClient.ts
+++ b/src/shared/libs/apiClient.ts
@@ -33,6 +33,6 @@ export const apiClient = ky.create({
   headers: {
     'Content-Type': 'application/json',
   },
-
+  credentials: 'same-origin',
   hooks: formatErrorResponseHooks,
 });
diff --git a/src/shared/libs/formatErrorResponseHooks.ts b/src/shared/libs/formatErrorResponseHooks.ts
index ead00af6..56f9b468 100644
--- a/src/shared/libs/formatErrorResponseHooks.ts
+++ b/src/shared/libs/formatErrorResponseHooks.ts
@@ -14,26 +14,30 @@ const beforeErrorHook = async (error: HTTPError) => {
 
   if (response.status === 401) {
     console.error('클라이언트 측에서 401 에러 감지. 세션이 만료되었습니다.');
-    const { clearUser } = useRoamReadyStore.getState();
-    clearUser();
+    const { user, clearUser } = useRoamReadyStore.getState();
 
-    queryClient.invalidateQueries({ queryKey: ['user', 'me'] });
+    if (user) {
+      console.error('세션 만료 처리 시작');
+      clearUser();
+      queryClient.invalidateQueries({ queryKey: ['user', 'me'] });
 
-    const currentPathname = window.location.pathname;
-    const isCurrentlyOnProtectedPage = protectedPageRoutes.some((route) =>
-      currentPathname.startsWith(route),
-    );
-
-    if (response.status === 401 && isCurrentlyOnProtectedPage) {
-      console.error(
-        '클라이언트 측에서 401 에러 감지. 보호된 페이지에서 세션이 만료되었습니다.',
-      );
-      const redirectUrl = new URL(
-        ROUTES.ACTIVITIES.ROOT,
-        window.location.origin,
+      const currentPathname = window.location.pathname;
+      const isCurrentlyOnProtectedPage = protectedPageRoutes.some((route) =>
+        currentPathname.startsWith(route),
       );
-      redirectUrl.searchParams.set('error', ERROR_CODES.SESSION_EXPIRED);
-      window.location.href = redirectUrl.toString();
+
+      if (isCurrentlyOnProtectedPage) {
+        const redirectUrl = new URL(
+          ROUTES.ACTIVITIES.ROOT,
+          window.location.origin,
+        );
+        redirectUrl.searchParams.set('error', ERROR_CODES.SESSION_EXPIRED);
+        window.location.href = redirectUrl.toString();
+      } else {
+        window.location.reload();
+      }
+    } else {
+      console.log('[401] 로그인 안된 상태에서 발생한 요청이므로 무시');
     }
   }