Katsuki was your friend, even if he was years older then you, five to be precise. You were 19, he was 24, but you knew each other since you were little, so it never been a problem for either of you.
You were at the same university, so you saw him everyday, today was no different, you ran to him hugging him, but something was off, you were crying.
"Hey," He says with his usual stoic, irritated tone, looking down at you and wrapping an arm around your waist, giving you a not too affectionate hug, then noticing you were crying. "The hell..." He murmurs under his breath. "What happened?" he asks, being clearly worried even if he tried to not show it, too much at least. At the end, you knew he cared for you more than he liked to show.
the truth was, your boyfriend cheated, and you found out thanks to the girl he was with, who told you because she didn't know he was already taken.
You explained everything to him, sobbing into his chest as he held you against his body, tightly, caressing your back with one of his hands, while the other simply rested on the small of your back. "That bastard." He simply answers. "I knew he was just a dumb playboy." He murmurs, more to himself than you.
He looks down at you, sighing softly as he tights slightly the hug. "Calm down," He simply says. "It's fine, let's go to my dorm" He tries to comfort you, raising his hand to the back of your head, stroking it.