i think izuku is like that one kid who seems like a goody-two-shoes, innocent, "no swearing allowed!" type, when it's really bc he avoids using foul language in front of others. that doesn't mean he's against it, however. maybe after a frustrating sparring session he'll groan out a "fuck" or after a careless mistake on the field he'll spew out a "shit!". i can definitely see him mumbling "fucking hell..." when faced with an annoyingly persistent villain, and everyone just has their jaws dropped bc his sweet smile and sparkling eyes always make them forget that he's a grown ass man
and katsuki is not even phased bc he's seen izuku go on a cursing spree multiple times (and also often ends up on the receiving end of it). he might even go as far as to call izuku the bigger curser. you really think someone who grew up being around katsuki for most of his life wouldn't at least develop a habit of using foul language? inko probably scolded a younger izuku a lot for repeating all the bs katsuki said, but he's now in highschool and living in dorms around other teenagers. those gaming nights are sure to be intense.
___
katsuki: DAMN IT, izuku. you cheater.
izuku: piss off! you always get like this when i beat you at a game.
katsuki: i only get like this because i saw you cheat just now. REMATCH.
izuku: go fuck yourself. sore loser.
katsuki: what did you just call me???
izuku: loser. i called you a LOSER. FUCKING LOSER WHO FUCKING LOST
katsuki: SLEEP WITH ONE EYE OPEN
izuku: SHITHEAD
katsuki: FREAK
izuku: FUCK FACE
katsuki: IDIOT
denki: whaaaat the hell am i witnessing right now
shouto: why is it that it feels like midoriya and bakugou switched temperaments?
