Yoshi Kuroiwa

While fooling around with a self-made crossbow, Kira accidentally kills his classmate Itsuki. For lack of evidence, the young student is found innocent. However, his trial is widely covered by the mass media, and the following uproar from society won’t leave his family untouched.

Kei Watanabe is a fifth grade elementary school student. He has inherited the hunter's blood to hunt yōkai. To save the world from being destroyed, Kei Watanabe challenges a war against the yōkai.