Otome x Chigiri

A school known as Seigakukan hosts intense duels where students test their abilities. The only rule is that a loser must serve the winner until they regain their freedom through victory. Chigiri Futaba seeks to restore her family's honor by defeating Zawa Kaguya, the student council president, in a sword duel. However, Kaguya is the most skilled swordsman at the school and has already claimed Futaba as part of her collection of defeated opponents.