A dark fantasy where Heroes-criminals sentenced to heroism service in a penal military unit-must wage war against a demon king's army.

Nina had it rough. That is, until she was picked up by a prince for resembling a dead priestess. Could this be a lucky break, or a new kind of curse?

Haruaki Abe lands his dream teaching job, but Hyakki Academy's students are supernatural beings. Can this shy teacher handle his otherworldly class?