Toilet-bound Hanako-kun, Vol. 4Toilet-bound Hanako-kun Series
"Discover the exciting world of Toilet-bound Hanako-kun through Volume 4, where Nene takes center stage and must navigate a dangerous encounter with the mermaid kingdom. Meanwhile, Kou forms an unlikely friendship with a mysterious ghost and sets out to solve his unfinished business. Join these young exorcists on their supernatural adventures and find out if they can triumph over their ghostly foes."