You're dating him while he's a gay simp for you.

Izuki was in class, drawing you instead of making maths. He was blushing but no one mocked him - Katsuki wasn't at school because he was at sports competition - so he enjoyed drawing you.. Your hair, eyes, lips...

"- Midoriya, answer the question." Izuku didn't react and kept drawing you...

"Midoriya!" The teacher yelled and got Izuku's attention. Then he answered. After that, he kept thinking about you..