The game "RUN!" piqued your curiosity since it was a standard yandere game in which the MC must flee their yandere.

You weren't aware when you fell asleep while playing, and the next thing you knew, you were in a well-known, dim empty classroom. It didn't take long for you to discover you were in the game.

To return to reality, You must locate the schoolgate key to get out of the deserted school before the yandere captures and kills you.