Sex & Dungeon!! 1 (Vamp Comics)

[Machine Translation] The main character, Sohei Saino, has parents who are adventurers. His parents are often away on adventures, and since childhood, Sohei has always stayed at home by himself, dreaming of one day going on an adventure with his parents. Then, a huge labyrinth suddenly appears in the basement of their house. But it is a special dungeon where he can only get stronger by having sex with girls and raising his lvl (love) level. In order to get closer to becoming an adventurer, he sets out to conquer this dungeon on behalf of his absent parents. This is the first volume of the much talked-about sex fantasy!

主人公・斎野創平は冒険家の両親をもつ。両親はともに冒険へ出かけて不在のことが多く子供のころから創平はいつもひとりで留守番をしておりいつの日か両親とともに冒険へ行くのが夢だった。そんな折、自宅の地下室に突然巨大迷宮が現れる。だがそこは女の子とエッチしてLv（ラヴ）を上げることでしか強くなれない特殊すぎるダンジョンだった。冒険家に近づくために不在の両親に代わってこのダンジョンの攻略に乗り出す――。話題のセックスファンタジー、第1巻！