Only a pure maiden can have the privilege to contract with a spirit. In here, Areishia Spirit Academy, trained maidens of noble families are gathered and given an elite's education to become spirit contractors. A boy, Kamito, peeped by accident at a girl, Claire, while she was taking a bath and he ended up making a contract with the spirit she wanted. Yes, Kamito is an irregular boy spirit contractor whose existence was thought impossible until now. "You stole...my spirit...you have to take responsibility for it!" "Huh?" "You have to become my contracted spirit!" What will Kamito's destiny lead to?