Ikuya Magasa is a freshman in high school with no dreams or particular interests, and so he just lets the days pass by. On their way home one day, his friend Kaze Amaba makes a shocking confession. "Truth is, I'm a tengu." Amaba had longed to live in the world of humans, and in order to remain there, he invites Ikuya to start a band. From then on, Ikuya's normal days started to become more and more abnormal?