The long-standing war between humanity and the demon race was brought to an end by “The 5 Battle Maiden Heroes,” a group of young female warriors. The dying Great Demon King graciously accepted defeat, revealing his true face that had been hidden behind a mask all along, and praised the maidens as “strong and beautiful.” However, the Demon King was careless. Due to the prolonged war, most of human males had perished, leading to a skewed male-to-female ratio and a divergence in concepts of chastity between humans and demons. The female heroes, inexperienced in love, yearned for romantic relationships with men and were starving for affection. Before they knew it, they had fallen head over heels for the Great Demon King, abducting him and starting a life of shared confinement, greedily monopolizing the Demon King amongst themselves. Those who tried to interfere with this lifestyle became enemies to the female heroes, whether they were fellow humans or not, and thus, the world unwittingly gave birth to monsters more troublesome than the Great Demon King himself.