The Fl and ml were childhood friends I think, but in high school the ml became a delinquent and hurt fl's feelings, they went to the same college after and now in college he's trying to win her back.
It's not a manhua and I'm not sure since that's a really common plot but maybe https://www.mangago.me/read-manga/first_love_lasting_hate/ ?
came here to bust a nut but his backstory is making me kinda emotional tbh