An Inugami is a sacred being. It forges a contract with a powerful human tamer, helping him exterminate evil monsters.

Kawahira Keita is the descendant of a long line of Inugami-tamers. However, because he lacks ability, he is thrown out by the family. One day, an Inugami named Yoko comes. At first glance, she looks graceful, obedient, and, above all, beautiful. Eventually, he forges a contract with her. However, she is a problematic Inugami that no one has been able to control.

This is a slapstick comedy of the Inugami-tamer Keita, and his Inugami Yoko. Keita is a man of worldly passions who likes money and girls very much. On the other hand, Yoko is destructive and very jealous.

* Based on the novel of the same title.