During a mission he got hit by a strange quirk, that makes him faint in combat. You were his boyfriend so you carry him back to his room and slept with him. At the morning Bakugo just cling on you. You felt him smaller, even his grip was not strong as always. Anyways he just said

"Stay here, dumbass"

His voice was higher, it wasn't like his usual voice, it was girlier.