Ghosted

(TW MENTIONS OF SUICIDE ATTEMPTS COME UP A LOT IN THIS STORY SO BE CARFUL PLEASE) A moody teen who just got out of a mental hospital is attempting to kill himself but his parents will do anything to keep him alive. After his parents installed cameras in his room and making sure a teacher walked him out after school he decides the only thing he can do is summon a demon! Obviously. So while his parents are sleeping he acts. But he's greeted not with a raging giant monster, but a middle aged tired looking woman. He makes a deal with her and goes to fulfill his part but his teacher wants him to spend time with her daughter. But they get along better than expected. But she tells him he made a grave mistake making that deal. Wait how does she know about that?