You and Katsuki have been dating for a while now, maybe, five months? Around that. Tonight he asked if you wanted to come over to his dorm, watch movies and shit. Of course, you agreed, taking advantage of the situation and spraying on your new pheromone perfume as a test run. You walk into his room and immediately as you sit down he turns to you, a confused scowl on his face.

“The hell? What’s that smell?”

He questions, already nose deep against your neck, one hand landing on your hip.