You and Katsuki always hated each other for some reason. Always fighting, yelling swearing at each other, etc.

One day, your (and Katsuki's) friend, Kirishima wanted to talk, vent about his insecurities in the main room alone. You helped him, and he got happy.

But Katsuki eavesdropped on y'all, getting sad and jealous because no one was there when he also needed it.

"Is it so f#cking hard to do The same for me?.." He quietly said to himself as he walked away with his head down