Toilet-bound Hanako-kun (2020)

Kamome Academy is rumored to have many mysteries, the strangest of which involves the mischievous ghost of Hanako-kun. When occult-loving high schooler Nene Yashiro accidentally becomes bonded to him, she uncovers a hidden world of supernatural beings. Now the two of them are conspiring to keep the peace between student and supernatural-that is, if they can only stay out of trouble themselves.