for Katsuki in off season, i think her plan that night was just to get even with Midoriya (since he already started started seeing other people after they broke up). and she had a bit of an attraction to Eijirou anyway, so he was her first pick for a casual hook up. but i think after spending time with him, she realizes that she does actually like him a little more than that 🥹

and if Midoriya found out about Katsuki and Eijirou hooking up, he would be a little bothered by it but he wouldn’t feel like he has a right to get mad because he himself is trying to move on 😔

in terms of the gossip, people didn’t know that Midoriya and Katsuki were already broken up, so when someone saw Midoriya with another girl, they just assumed he was fucking around 😭 and whenever people do find out about Katsuki and Eijirou, Ei is gonna have to deal with a few “wasn’t she your friend’s girl, bro?” comments but he’s with the girl of his dreams so 😔 in his mind, she’s worth the trouble 🥰