Midoriya, Iida, Kaminari, Mina, Jirou, Bakugo, Todoroki, Kirishima, Ochaco, Hagakure, Tetsutetsu, Shinsou, Mirio, Tamake, Hawks, Sero, Soreno and Yuki are all exposed to a quirk when in Gym Gamma. This quirk is a sex quirk, it heightens everyone’s arousal until they are so aroused they just have to get it on. Everyone has returned to the gym and the effects are starting.