When a series of animal bodies that rot away after a single night begin appearing in a remote mountain village, Inugami, a detective from Tokyo who specializes in the occult, is called to investigate.

While working the case, he befriends a strange boy who works in the field every day instead of going to school. Shunned by his peers and nicknamed "Dorotabo" after a yokai that lives in the mud, he helps Inugami uncover the truth behind the killings - but supernatural forces are at work, and while Dorotabo is just a nickname, it might not be the only thing about the boy that isn't human.

Hades-sensei is no ordinary middle school doctor. In fact, many students believe he is a shinigami. His excessive friendliness and eagerness to win his students' affection does little to offset his terrifying appearance. But, fortunately for this middle school, Hades-sensei is an expert at extracting "byouma", disease demons, from possessed students!

Clay, a child prodigy, was hired at the age of 14 to become a professor to make chimeras, creatures made with a fusion of various materials. However, after he was hired, he was unable to meet the expectations of the company that hired him and was fired. He comes upon an abandoned research facility and creates a human child chimera and names him Muddy. Together, they will go out into the world and find out what Muddy is capable of.