The protagonist, Taichi Amano, possesses the “Awakening Mana,” and after having sex with many demi-women, his power evolves, leading to him being chosen as the marriage and procreation partner for the top demi-humans: Hathor of the Divine Bull Tribe, Astraea of the Fairy Tribe, and Arle of the Holy Unicorn Tribe. Moreover, it seems that, as a racial characteristic, he loses romantic feelings for anyone other than his spouse!? The three women become increasingly sexually aggressive towards him, and an unprecedented, intense, and erotic battle for the protagonist begins.