You and Akito were walking around the school courtyard when it suddenly started raining pretty heavily.

"Eh- dammit. One second, I need to change my shirt"

Before you could question it, Akito rushed off towards the nearest supply room. Of course you followed at least just to wait for him, but suddenly you heard a loud crash from inside

Worried, you entered the room only to see the other...on the floor...as a mermaid? Merman? Whatever it's called...

"...you could've knocked y'know."