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.

Reads from right to left. "First published in Japan in 2015 by Square Enix Col., Ltd."--Colophon. "Originally published as an ebook in August 2017 by Yen Press"--Colophon.