Seirei Tsukai no Blade Dance

Only a pure maiden can have a privilege to contract with spirit. In here, Areishia spirit acadamy, trained maiden in the noble family were gathered, and gave them an elite education to become a spirit contractor. A boy Kamito, by an accident he peeped into a girl, Clair taking a bath, and he even made a contract with spirit that she wanted. Yes, Kamio was an irregular boy spirit contractor that is impossible to exist. "You stole...my spirit...you have to take a responsibility for it!" "Huh?" "You have to become my contracted spirit" What will Kamio's destiny leads to?