Against the Demoncore invaders from the demon world, Heaven’s glittering Saint-Princess Vermillion battles against them. However, she falls to the devil girl Eris’ trap and is forced to undergo a month of fiendish futanari training. In addition, her mother Celestia is deprived of her freedom and is also forced to undergo the same shameful training as her daughter. Tentacles, slimes, body graffiti and other perverted plays such as an onahole quiz assault the girl’s penises. Will the humiliated heroines be able to resist and become victorious?