Demon Lord Diabolis channels his dark power into a cute teddy bear born from a child's imagination, sending it as an assassin to target Aurora. Meanwhile, Reiho, the beautiful girl masked heroine Aurora, uses divine magic granted by the gods to protect the town from the Demon Lord's attacks. She meets the teddy bear, who's been scolded for his behavior at the convenience store where she works. From that day on, while her parents are away on a trip, Reiho is left to take care of the bear. Though he appears innocent, the bear repeatedly engages in lewd acts—stealing Reiho's underwear, reading adult magazines, and growing increasingly aroused by the Demon Lord's lustful energy. Gradually, he turns his desires toward Aurora herself. With a shockingly large erect member hidden beneath his innocent appearance, he defiles Aurora's body, eventually revealing his rampaging true form, ensnaring her with tentacles, and swallowing her whole... leading to an unexpected and devastating BAD END.