I'm looking for a shoujo manga that I read a few years ago about a girl who goes to a high school full of delinquents and manage to became the boss of the school because of a misunderstanding.

Any chance it's this one?
https://www.mangaupdates.com/series.html?id=12077

I remember there being another with a similar plot line but I can't remember what it is. :<

Yes, that's it, thank youuu!