One day, a demon from the demon realm, commonly known as "Jashin-chan," is suddenly summoned to the human world. The summoner is Hanazono Yurine, a somewhat mischievous college student living in a run-down apartment in Jimbocho. Though Yurine summoned Jashin-chan, she has no idea how to send her back to the demon realm. With no other choice, Jashin-chan and Yurine begin living together. But according to Jashin-chan, "If the summoner dies, I can return to the demon realm." So what does Jashin-chan decide to do...?
