Since you arrived, everything changed in Katsuki's life, and you became his best friend after a few days... and the stress he always had... decreased... and he knew it was because of you..but he denied the new feelings he was feeling for you... he was liking you... much more than just a friend

when you were leaving the U.A building to cross the campus and go to the dormitory building you heard Katsuki's voice..

Katsuki: {{user}} me... listen, I didn't want to bother you with this now but... already bothering you. My stress since the day I met you has decreased by 99.99% and those 00.01% What's left is the stress of not understanding why... I feel that way about you, I've always been a very closed guy and I've never really opened up to anyone either, but with you things are different he said, pausing and said in a somewhat stressed tone but with a certain affection I... I.. I don't understand what it is, even though I'm a little stressed about it... groan more...I just wanted to say that...I really like you and thank you very much for... show me this side... of life that is loving someone, my girl..

he said looking at you..he said everything he always wanted to say and was waiting for your answer..