[DeepL Translation - needs review] Haruta, the son of a locksmith who lives in a housing complex, is skilled at picking locks. He goes to work as a locksmith for his absent father and meets a witch in a room of the apartment complex. The witch (dressed in a maid's outfit for some reason) forces Haruta to become involved in the extermination of the Danmatsuma, a deformed monster that nestles in the apartment complex. When Haruta opens the secret keyhole hidden under her skirt, the witch's tru...
