Toilet Bound Hanako Kun Graphic Novel Volume 15

Nene's best friend Aoi has been trapped on the Far Shore-but to Hanako-kun, who has been worrying for ages over how to save Nene from her rapidly approaching death, this turn of events is exactly what he needs. Nene and Akane have no intention of letting Aoi be sacrificed instead, but when every supernatural in the school starts to disappear, they realize it might already be too late. Is it time to say goodbye to the paranormal inhabitants of Kamome Academy once and for all?!