A demon girl gets stuck in your apartment and the only escape is murdering you, except she's useless at it and you're very good at hitting things. The joke doesn't get old because Yurine treats regeneration like permission to commit violence, and Jashin-chan's desperation makes every failed murder attempt funnier. Eleven episodes of pure slapstick with no plot getting in the way, no character arcs, no lesson learned, just two people trapped together in the funniest possible version of that premise.

Yurine Hanazono, a gothic lolita with a talent for the occult, summons Jashin-chan, a demon girl with a cobra's tail. There's just one problem: Yurine has no idea how to send her back to Hell. Now Jashin-chan is stuck living in Yurine's apartment as her familiar. The only escape route requires Jashin-chan to kill her summoner, but she's spectacularly bad at it. Because Jashin-chan is immortal and can regenerate, Yurine holds nothing back, answering each evil scheme with gruesome punishment from a whole range of weapons. Jashin-chan's demon friends also drop by: the kindhearted Gorgon Medusa and the energetic minotaur Minosu. Far better behaved than she is, they disapprove of her plans to kill Yurine. The result is a slapstick supernatural comedy adapted from Yukiwo's manga.