TBHK

Toilet-Bound Hanako-kun is a Japanese manga series by AidaIro. It has been serialized in Square Enix’s shōnen manga magazine Monthly GFantasy since 2014. It has been collected in sixteen tankōbon volumes as of April 2021. The manga is licensed in North America by Yen Press.

https://en.wikipedia.org/wiki/Toilet-Bound_Hanako-kun