Toilet-Bound Hanako-Kun, Vol. 21 (manga)

It’s autumn at Kamome Academy, and the annual school festival is underway. While Nene and her friends are busy with preparations, a select few begin carrying out their plot in the shadows—they have their eyes set on the yorishiro of No. 1 of the seven School Mysteries, the Clock Keeper. When supernaturals burst onto the scene, what was supposed to be a fun school festival turns into an unexpected crisis…!