サムライガール

"Naoya, you know how I feel about you don't you?"
Takamori Academy used to be a prestigious school that graduated a lot of the people in the local community. It is now a wild school, and the attractive and braless high school student Setsuna has appeared there only to be taken down by the school's tough students This beautiful girl's master is Naoya, the weak looking hero of the story. Setsuna and the good hearted Naoya end up in a master and servant relationship, but then.

[From DLSite English]