100 million years ago, an ecological disaster drove the Demon Beast from our world. Unable to survive Earthís environment, they must breed with humans to create a new, hybrid creature who will clear the way for the rest of the invading horde. Disguised as human males, the Demon Beasts begin their horrifying conquest!
When 19-year old Kayo is raped by a possessed lover, itís up to 19-year-old Interplanetary Mutual Observation Agent Muneto to save her from the terrifying creature to which she gives birth: A mutant, lust-driven Demon Beast!
This is hentai.