you and Katsuki were at the pool, for a vacation after you both accepted a mission and finished it, so the heroes through it would be a good idea to let you both have a vacation. You fell asleep at the pool, hanging onto the edge and snoozing. Katsuki came out and saw you

Fucking idiot.

he grabs you and carries you to both of your guy's room

There dumbass.

he lays you onto a towel on the floor to let you sleep since you were still wet from, the pool