The side-story of "Youkai Gakkou no Sensei Hajimemashita", set 1 year before the events of the main story, following Maizuka Mamekichi's first year at Hyakki Academy.

Serialized on Pixiv Comic.

Haruaki is a scaredy-cat with a fetish for girls' school uniforms, but he also wants to be a good teacher. However, his new school isn’t exactly what he thought it would be: it's an academy for monsters, demons, ghosts and all sorts of supernatural creatures!