diff --git a/playwright/README.md b/playwright/README.md
index 777a800..3147281 100644
--- a/playwright/README.md
+++ b/playwright/README.md
@@ -1,5 +1,5 @@
 ```python
-# main.py
+# play.py
 from playwright.async_api import async_playwright as aP
 import xvfbwrapper, io, os
 from db import DB
@@ -14,15 +14,17 @@ async def Page(browser='chromium', headless=True):
     context = await browser.new_context(accept_downloads=True)
     context.set_default_timeout(0)
 
-    async def handle_request(route):
-        url = route.request.url
-        if body := db[url]: return await route.fulfill(body=body)
-        if response := await route.continue_():
-            if response.ok and not db.exists(url):
-                db[url] = await response.body()
-            await route.fulfill(response=response)
+    async def save(response):
+        if response.ok and not db.exists(url := response.url):
+            db[url] = await response.body()
+        
+    async def load(route):
+        if body := db[route.request.url]:
+            return await route.fulfill(body=body)
+        await route.continue_()
 
-    await context.route('**/*', handle_request)
+    context.on('response', save)
+    await context.route('**/*', load)
     for block in ['**/*.gif', '**/css*.js']:
         await context.route(block, lambda route: route.abort())
         
@@ -36,10 +38,11 @@ if __name__ == "__main__":
 
 ```python
 # db.py
+# db.py
 import sqlite3, json
 
 class DB(sqlite3.Connection):
-    def __init__(self, db_name="db.sqlite"):
+    def __init__(self, db_name=".db.sqlite"):
         super().__init__(db_name)
         with self:
             self.execute('''
@@ -97,4 +100,31 @@ class DB(sqlite3.Connection):
                 LIMIT 1
             ''', (key,))
             return bool(cur.fetchone())
+
+if __name__ == '__main__':
+    db = DB()
+
+    # 문자열 저장 및 조회
+    db['hello'] = 'world'
+    print(db['hello'])  # 출력: world (str 타입)
+    
+    # 숫자 저장 및 조회
+    db['number'] = 42
+    print(db['number'])  # 출력: 42 (int 타입)
+    
+    # 바이너리 데이터 저장 및 조회
+    db['binary'] = b'binary data'
+    print(db['binary'])  # 출력: b'binary data' (bytes 타입)
+    
+    # 복잡한 객체 저장
+    complex_obj = {'name': 'John', 'age': 30, 'city': 'New York'}
+    db['complex'] = complex_obj
+    loaded_obj = db['complex']
+    print(loaded_obj)  # 출력: {'name': 'John', 'age': 30, 'city': 'New York'} (dict 타입)
+    
+    db['test_key'] = 'test_value'
+    
+    print(db.exists('test_key'))  # True
+    print(db.exists('non_existent_key'))  # False
+
 ```