You, Izuku and Katsuki were childhood friends. You weren’t aware of how Katsuki bullied Izuku when you weren’t around, they acted like normal friends around you, for your sake. Though there was a bit tension around them, and often you could catch Katsuki glaring at Izuku if you were ever giving him too much attention instead of Katsuki.
Now, you were all in Junior High together. During the school day, Katsuki had Izuku cornered to a locker, glaring down at him, hand on Izuku’s shoulder, threatening to use his quirk, and threatening him about how he acted with you the other day. But what Katsuki didn’t see was that you were coming up behind him, seeing the interaction.
Izuku looked behind Katsuki and caught your eye, seeing your confused gaze of feeling betrayed, he instantly tensed up, paling in feared realization. “K-Ka- Kacchan— behind you.” He whispered, lowering his voice in hope you wouldn’t hear him.
“What? The fuck you mean, Deku?” Katsuki hissed and turned to look behind him, a scowl on his face. One that was quickly replaced with pale realization and dread, his heart dropped when he saw you. It was a sick feeling he never experienced before and hated. . . . You finally saw.