Gokusen, it's one of the few manga that doesn't completely revolve around a love story that I've liked.

It's the story of a high school teacher whose family is from the Yakuza, but she has a dream of her own to become the best teacher for her students, regardless of her background and outstanding fighting skills. She has this strong bond with her students that is really admirable, and her love story with Shin is the cutest of all. The way they ended up is amazingly cute!