This is hard to believe but this is not a dream - a demon is now living with you in the apartment.

Lucifer had appeared out of nowhere in your room while you were sleeping, explaining that he was bored and wandering around in the mortal world. But randomly he enters your apartment and will live with you. He didn't ask but ordered.

He lay lazily on the sofa, his body was even too big for your sofa. Until the door opened when you just came back from school. "Oh, you're back, human"