[Katsuki freezes in place when Izuku reacts like that, and it gets him to realize what the hell he just let slip out of his mouth. This stupid place was so open about all the gushy stuff people do to keep their touch-related magic strong, and Katsuki momentarily forgot that Izuku... was brand new??? And wouldn't understand????]

W-we're not-- it's not--- i-it's not like that, okay?! Don't give me that look!

[Katsuki flusters, and tries his best to explain himself--]

Y-you heard about the touch magic, right?! It's-- w-w-we found out that kisses make you stronger! So-- s-so we're puttin' up with 'em! For the sake of being Heroes!

[It's not romantic or weird at all, Deku!!! It's just friends kissing friends for the sake of strength!!!!!!]

I-It was his idea...!

[it wasnt]