Ayumu is a high school student starting his freshman year. Because of a ‘mistake,’ he ends up in the wrong place and instead of attending the high school he aspired to; he finds himself enrolled in Onmyou Academy, a rather peculiar institution for girls that doesn’t appear anywhere. This academy is shrouded in secrecy, as both its students and teachers possess unique qualities. With the help of his new mentor (and a couple of allies); the young boy must confront his eccentric classmates and the even more dangerous vice principal of Onmyou in order to escape and return his normal life.