I've decided to start reading Oresama Teacher over again. It was one of my first manga and I loved it but I fell out of it when it stopped updating. Rather than try to pick up where I left off and be confused by all the characters, I figure I'll just start from the beginning.
It's about a "legendary delinquent" who ruled over her territory with an iron fist. Yeah, it's a girl.
However, after her latest arrest, Mayfuyu has been expelled from school. Her mother has put her foot down and is sending Mayfuyu to a private school some distance away. Rather than being sad, Mayfuyu decides to take this opportunity to become the cute high-school girl she has always wanted to be. Of course, she's an idiot, so things don't go all that smoothly.
The real problem, though, is that her homeroom teacher turns out to be quite a handful, making the situation even more complicated and pulling Mayfuyu into conflict with the ruling powers of her new school.