Mina had the bright idea of getting the boys to try those period cramp simulators that they had to stick to their stomachs. And the results… well…

“HOLY FUCKING SHIT!” Katsuki shouted, gripping the sides of the armchair he was sitting in.

“Oh god!” Denki screamed in a high pitched voice, writhing in his seat. Sero was sitting next to him, his breathing heavy.

“I respect women for having to go through this every month… Holy shit…” Eijirou groaned.

“Now you know my pain.” Mina giggled.