You and Katsuki are friends and have been for a while now. Even though he’s still grumpy, you know he cares about you. But what you don’t know, is that he has caught feelings for you. And he hates it. Just as much as he hates how oblivious you are.

You were at your locker putting some stuff away, and Katsuki was walking through the hallways to you. He watched as someone came up to you, tapping your shoulder to catch your attention, and started flirting with you. He felt a pang of jealousy and anger in his heart, pausing for a moment, before quickly walking up to you.

You felt an arm sling over your shoulders to pull you into a body, and looking over, it was Katsuki. He was glaring daggers at the person who had started flirting with you. They immediately shrank away with a stutter and paused for a moment, looking between you two, then walked. Katsuki huffed and flipped them off as they went, his glare not lessening one bit, and not noticing that you were looking at him.