Toilet-Bound Hanako-kun, Vol. 1 (Used Paperback) - AidaIro
"Hanako-san, Hanako-san. . . are you there?" At Kamome Academy, rumors abound about the school's Seven Mysteries, one of which is Hanako-san. Said to occupy the third stall of the third-floor girls' bathroom in the old school building, Hanako-san 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-san she meets there is nothing like she imagined! Kamome Academy's Hanako-san. . . is a boy!
Jibaku shōnen Hanako-kun #1