Jashin-chan, a demon, is summoned by Yurine Hanazono, a gothic girl, but is unable to return home due to the lack of spell. In an attempt to escape, Jashin-chan adopts violent tactics, only to realize that Yurine is a tough opponent who employs physical strength to kill her in brutal manners, like blending her arm or cooking her. Although Jashin-chan can reconstitute herself, Yurine forces her to coexist and do chores in the apartment despite frequently dismantling her.