Toilet-bound Hanako-kun / AidaIro

"When Nene is invited by enigmatic playboy Natsuhiko to a sketchy yet oddly enjoyable tea party, she meets Hanako-kun's 'girlfriend' and his 'little brother'. . . ?! On top of that, she learns that one of her classmates might actually be a School Mystery, but she doesn't know who! Hanako offers to help -but just how far will he go to lure this supernatural out of hiding?"--Provided by publisher.

"School Mystery No. 1's Clock Keeper of the future has gone out of control, turning Kamome Academy's entire student body into wrinkly old people! Hanako-kun, Nene, Kou, and Akane will have to work together to catch this agile trickster and keep the school from becoming a retirement home. But just when they seem to have Mirai cornered, one final prank goes horribly wrong, bringing Nene's secret out into the open"--Provided by publisher.

"Nene and Kou want to learn more about their mysterious friend, Hanako-kun--and what better way to do that than by hunting down school mystery number five, 'The Four P.M. Bookstacks'?! Rumors say a secret door in the library leads the way to a supernaturally special collection. The Bookstacks know everything about everyone who's 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!"--Back cover.

"It's been three days since they returned from within School Mystery Three, the Hell of Mirrors. To cheer up the depressed Kou, Nene heads to the Boundaries' Tanabata festival. She was supposed to be enjoying the festival with Hanako-kun and Kou, but suddenly she finds herself fifty years in the past--and happens to meet the living Hanako-kun there"--Provided by publisher.

"Nene and Akane are rescued from the clutches of a horde of supernaturals by School Mystery No. 6... who then immediately kidnaps Aoi?! With so many School Mystery seats unfilled and the long, dark night of Urabon here at last, this ancient supernatural knows that Aoi may be the only one who can save the school from disaster--but at what cost?"--Provided by publisher.

"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. In exchange, she has to help him resolve the problems caused by the school's supernaturals--starting with rescuing her friend Aoi from the clutches of the Misaki Stairs, one of the infamous Seven Mysteries. Can they reach the innermost depths of the Stairs before time runs out? And if they do, what dangers and secrets await them there...?"--Back cover.

"The origin of AidaIro's masterpiece! Toilet-bound Hanako-kun was originally published as a self-contained short series, and [the reader] can read those three chapters here along with AidaIro's debut work, 'My Dear Living Dead.' If [one] want[s] to see Nene try to curse her ex to death, Kou fall off a roof (more than once), or Hanako-kun butt heads with a new group of School Mysteries, come and see where it all began!"--Back cover.

"Nene has managed to escape the final resting place of all the kannagi sacrificed in this town, reuniting with Kou and the boy they now know to be a younger version of Tsukasa. As the beginning of the Yugi family tragedy is finally unveiled, Kou sees a chance to put everything to rights--if they can all escape the Red House. But this cursed mansion has already made the consequences of trying to free Tsukasa from its clutches very clear"--Back cover.

"At Kanmore 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 thus haunted bathroom ... but the Hanako-san she meets there is nothing like she imagined!"--Back cover.