​In a world devastated by an ancient catastrophe, the Demon Beasts return to mate with human women and spawn a new breed capable of paving the path for an invading army. Trapped in a horrifying ordeal, 19-year-old Kayo falls victim to a possessed lover, giving birth to a mutant, uncontrollably lustful Demon Beast. It’s now up to Interplanetary Mutual Observation Agent Muneto to rescue Kayo from this monstrous creature and prevent further destruction. Brace yourself for a thrilling tale packed with intense encounters and dark desires as Muneto battles against time to save the world from its impending doom.​