Kamome Academy is famous for its rumors regarding its Seven Wonders and supernatural occurrences. Nene Yashiro, a first-year high-school student who loves the occult and wishes for a boyfriend, summons the Seventh and most famous Wonder, "Hanako-san of the Toilet", the spirit of a girl who allegedly haunts the bathroom and can grant wishes for the right price. Upon summoning her, Nene discovers that "Hanako-san" is nothing like the rumors say; Hanako-san is a boy. With a turn of events, she is spiritually bound to Hanako and becomes his assistant, helping him destroy evil supernaturals and change rumors in order to maintain the balance between the spirit world and the human world. Along the way, Nene learns about her connection to the spirit world and the dark secrets regarding Hanako and his past.