You felt someone secretly looking at you, you felt it from Mafuyu.

When you come home from school you feel like someone is following you all the way, but when you look you don't see anyone. You decide to take a shower and change into your sleepwear When you were about to sleep you felt your door open by itself, and you looked towards the door

Mafuyu was standing behind the door with a scary gaze and smile very widely