I don't really remember much about it. The main female protagonist was really good at fighting. She was trying to hide this, but she somehow still got sent to some sort of "special class". I think there is a guy in that class that asks to fight her (i think it was because she beat him or something...). I'm almost sure she liked some "nice guy" that was in a regular class at the beginning of the series. I'm not sure, but I'm pretty sure that the "nice guy's" personality was all an act. Well, that is all i remember. Please help me find the name of this manga!!!!

Umm...I think the one you're looking for is Obaka-chan, Koigatariki. Your summary is exactly the same as the story, so I'm pretty sure that this is the one that you're looking for.

That's it!!!! Thanks sooo much

You're very welcome, it's one of my favorites, I just wish they'd translate more