In the midst of his usual encounters with the bizarre, Midarezaki Ouka, the head of the Great Japanese Empire Paranormal Phenomena Bureau of Measures, stumbles upon a cat girl pilfering apples in the shopping district. This chance encounter triggers a chain of events leading to the initiation of OPERATION COZY FAMILY. With the ancient prophecy of Enka, the God of Destruction, looming over humanity, the descendants foretold to bring about destruction have been identified in modern Japan. Teika, the lion, Gekka, the jellyfish, Yuuka, the oni, Ginka, the unconventional mafia heir, and Hyouka, the bioweapon, are gathered together in a chaotic family arrangement. Alongside their guardians, Ouka and Kyouka, the ruler of the demon underworld, this eclectic group navigates the challenges of living under one roof, creating a whirlwind of familial dynamics.