"So how am I a calculator again?" "You solve equations faster than a human and you do my homework." "Who the hell said I would do you homework?" Ayano Hamasaki is an aspiring ninja. She minds her own business and stays out of the way, but life refuses to let her be a side character. With a team composed of a blonde idiot, a pink fan girl, and an emo duck, what could possibly go wrong? Everything, especially when you add a math obsessed nobody.