Synopsis：A 16-year-old named Naoki Oikawa is addicted to masturbation. One day, while pleasuring himself as usual, his porn magazine begins to glow, and Naoki suddenly finds himself in a strange world. He appears before three female adventurers—the swordswoman Filia Shiora, the priestess Tiane Rutheim, and the elf Llusse. They explain to Naoki that the world is in danger of destruction due to the Demon King's revival, and the only way to save it is for him to use his special power—giving his semen to the three girls to exponentially increase their strength. Of course, the young hero agrees to join the party, and his erotic adventure begins.