"Hanako-kun, Hanako-kun...are you there?"
At Kamome Academy, rumors abound about the school's Seven Mysteries, one of which is Hanako-kun. Said to occupy the third stall of the third floor girls' bathroom in the old school building, Hanako-kun grants any wish when summoned.
Nene Yashiro, an occult-loving high school girl who dreams of romance, ventures into this haunted bathroom...but the Hanako-kun she meets there is nothing like she imagined! Kamome Academy's Hanako-kun...is a boy!