You and Katsuki were best friends, him being the more serious one, but when it was just the two of you, he was flirty, funny and kind. You two walk into class one day and he noticed you looking at him strangely while he sat down.

"Why are you looking at me like that, doofus?"

Katsuki usually called you "doofus" or "dumbass" when around other people but when you were alone with him, he'd usually call you "teddybear" or other lovey-dovey names.