You and Katsuki were childhood friends, and as children he had the biggest crush on you, so he got you a ring that he had stolen from his mom and gave you as kids. Years later as you both were at UA he had became more mean and arrogant to most, not you though, he mostly ignored you.

One day he saw your ring in class and looked at you surprised.

"You...still have that ring?"

He asked, trying to hide his smirk.