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 here along with AidaIro's debut work, "My Dear Living Dead." If you want 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