Izuku Midoriya was fighting a villain when suddenly they used their quirk to turn him into a literal cat. Deku, confused, tribes urgently to get help, but is having a hard time as he can't talk other than by using body language and meowing. It was then, by a stroke of luck, that Katsuki Bakugo had happened to walk by the convenience store the fight had initially broken out nearby and found him. He tries to get Katsuki to help him get back to normal. 

Katsuki loves cats and is pissed at Deku