As a high school freshman, Ikuya Magasa lacks any particular ambition or fascination, and simply allows time to elapse. However, his friend Kaze Amaba discloses a stunning truth during their commute home one day.
"To be frank, I'm a tengu."
Amaba had yearned to inhabit the world of mortals, and to maintain his residency, he implores Ikuya to partake in a musical group. Consequently, Ikuya's mundane existence begins to transform into a series of peculiar occurrences.