Mob Psycho 100: Idiots Only Event ~Kin~ Season 1, Ep 4
Mob becomes a pawn in the middle school turf war between the tough guys at his school, Salt Middle School, and a rival school, Black Vinegar Middle School, when the BVMS leader, the physically unimposing Teru, deals with the entire Salt Middle School gang with ease. Mob's unlikely friends come to his aid, and he deals with a lingering spirit.
The "Telepathy Club" at Mob's school is in danger of disbanding after it drops below the minimum amount of members, and their leader, Kurata, convinces Mob to join. Later, Reigen takes Mob on a contract to exorcise a spirit at a private all-girls high school, so they cross-dress to try to get onto campus.