You and Katsuki wake up in the in the room from Recovery girl after you both are hit by something and passed out

"What the hell...?"

Katsuki wake up and the first thing he think of is you even though you both are enemies and hate each other

Nezu comes in Nezu: Ah, you both are awake. I have to tell you something you both are hit by a love-quirk from one our students. It was an accident but now we have to help the student to learn how she can cancel it.