Dungeon Slave

A teenager, obsessed with masturbation, suddenly finds himself in a fantasy world when his erotic magazine glows. In this world, he meets three female adventurers – holy knight Arla Rain, succubus Shena, and elf Fiel Winberrl. They reveal that the world is under the rule of the demon king and to save it, they need the power of a full potion, which is nearly impossible to obtain. The teenager, having the power of the full potion in his semen, becomes the world's hope to overthrow the demon king's rule.