Funny, cute manga about a girl who changes places with her twin brother to rule a school for yankees. One of those reverse harem shojous, but done pretty well. So many dudes to ship her with, and they're all really protective and sweet and kinda thinking they're turning gay LOL. She's a cute heroin who can fight, but also a little helpless but she's NOT annoying which is a PLUS.
Kenka Bancho Otome - Koi no Battle Royale