The Trembling Female Teacher That Want to Escape

A woman comes to the old school building at night to collect students who never left, and the door locks behind her before she realizes there are no students at all, just tentacles waiting in the dark. Mrs. Touya, the advisor of the Occult Research Club, gets to find out exactly what that means for her.

The setup is simple and doesn't pretend otherwise: she's trapped, the building is against her, and whatever comes out of the floor and walls has one use for her. What follows plays out through sandbox exploration rather than a straight line, pushing her deeper into the building's grip scene by scene.

There's no rescue subplot or twist ending to speak of, just a teacher's steady unraveling at the hands of something that isn't going to let her go.