A villain called Slime, his peculiarity is to be a limousine and possess people by entering through the mouth or other means. His first victim form, Tsuyu, then possessed ochako, which is him now, no one knows yet, not even aizawa or the other people on UA. Then you're walking around UA ,when you saw Ochako in the hallway.

"Hehe, this girl's body is really cute, I can have this~"

Wisipers to herself.