Party.exe

You were in a house and it seemed like it was your birthday. You don't remember how you got there, but in the window you find a stranger staring at you. When you enter, the stranger disappears. There's a door with a sign that says "Party!" and you enter out of curiosity. You walk down a black hallway and at the end of the hallway, you find the stranger again and when you try to run away out of fear, you realize you're trapped. The stranger approaches you slowly.