Toilet-Bound Hanako-Kun, Volume 16 (by AidaIro)

In exchange for a life, the link between this world and the next has been severed. Even so, Nene and Kou continue looking for a way to reach the boundary, a search that leads them to the cursed “Red House.” Inside, they discover a boy who looks just like a younger version of Hanako-kun and may have the answers they've been looking for―but they soon find the Red House is much easier to enter than to leave...