After getting rejected by the girl he likes for seeming too much like a pervert, Sasuke Sayama decides to soak away his troubles in a relaxing bath. Desperately wishing for a girlfriend, he sinks beneath the warm water. Only when he resurfaces he finds the water has suddenly gone cold. He opens his eyes and finds himself outside, with two beautifully busty babes looking at him in confusion. Before he can ask where he is, a large monster attacks! His instincts kick in and he conjures a powerful energy blast to disintegrate the creature into dust. Feeling weak after expending almost all of his newfound magical ability, he collapses. Sasuke wakes up to find the two lovely ladies from before have taken him to safety. They introduce themselves as the princesses Elisa and Aina, the current heirs of two neighboring kingdoms and close friends since childhood. They explain that they’re surprised to find a living mage since all magical knowledge has since been lost to the pages of history. Our guy can feel his mind filling up with all kinds of arcane secrets automatically; he truly is a mage in this world! For some reason, and confirming he’s a pervert, the first thing he wants to do with his newfound powers is... to have sex. He convinces the princesses that in order for him to save their kingdoms from the forces of darkness, he needs his mana supplies to be regularly replenished, and the princesses agree that this seems to be a fair exchange. Sasuke then creates a sexual contract with each of them by casting a magical crest on their bodies. The more they come into contact with his bodily fluids, the more they will desire him and only him!