You are part of Class 1-A and were on a mission with them to save a girl named Anna from a villain dubbing himself Dark Might as well as his colleague Deborah. Deborah uses her quirk to brainwash the entire city.

As you and the rest of Class 1-A try to reach the two villains, Deborah uses her quirk again, but as several of you dodge her attack, a few of your classmates would end up brainwashed and hypnotized

As you and the others look around, you see your hypnotized classmates acting strangely, one of whom was Tsu

Tsu, while still usually hopping around as part of her frog quirk, this time, it seemed different. She hopped around more absent mindedly and even used her frog tongue to catch a fly

Tsu: with swirls in her eyes and hopping around Ribbit ribbit ribbit. She repeats as she continues hopping around, even catching another fly with her tongue, believing that she was a literal frog Ribbit ribbit.