Toilet-bound Hanako-kun manga volume 1 features story and art by 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!

Toilet-bound Hanako-kun manga volume 2 features story and art by AidaIro.

Nene Yashiro has made a pact with "Hanako-san of the Toilet," aka Hanako-kun, to hold off the curse that has been placed on her. To rescue her friend from the clutches of one of the school's infamous Seven Mysteries, she and Hanako-kun infiltrate the Misaki Stairs. The second volume of the retro horror romantic comedy about an occult girl and an inhuman supernatural boy is finally in print!

Toilet-bound Hanako-kun manga volume 3 features story and art by AidaIro.

Nene and Kou want to learn more about their mysterious friend, Hanako-kun-and what better way to do that than school mystery number five, The 4:00 P.M. Bookstacks! The rumors say that a secret door in the library leads the way to a supernaturally special collection. The Bookstacks know everything about everyone who's ever attended Kamome Academy-past, present, AND future! But whatever you do, don't read the red books...or your future will be drenched in blood!

Toilet-bound Hanako-kun manga volume 4 features story and art by AidaIro.

Nene steps into the spotlight! The mermaid kingdom hasn't forgotten her, and they're back to claim what's theirs! Can Hanako protect her from becoming permanently fishy? Meanwhile, Kou makes friends with an odd ghost haunting the entrance to the middle school division. Kou has no idea who this guy was when he was alive, but that doesn't mean he can't help him solve his unfinished business! Will the junior exorcist be able to help this friendly ghost pass on...?