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 permanent

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 4pm Bookstacks! T

Through the workings of the School Mystery Clock Keepers, Kamome Academy's entire student body is covered in wrinkles!? To restore peace to the school, Hanako-k

After going to rescue Aoi, Hanako-kun and Nene are thrown from No. 6’s boundary and suddenly find themselves in a strange village, where they meet a girl name

The origin of AidaIro’s masterpiece! Toilet-bound Hanako-kun was originally published as a self-contained short series, and you can read those three chapters