Sex Leveling

Yuu’s not doing too well in life. In The Dungeon, an underground dungeon that appeared underneath our world one day, all who enter gain stats and abilities. Yet Yuu, despite his attempts for 12 years, has barely ever managed to just scrape by. But then one day, a chance encounter with a goblin helps him level up. He does, and learns a new skill called “Sex Leveling.” By fucking and cumming in others, he can raise his partner’s level? As he’s checking the details, he’s attacked, but rescued by a girl who’s very curious about his new ability…