魔窟の王~余命一か月の童貞、魔法少女ハーレムを築いて王へ君臨す~, The King of the Demon Lair A Virgin with One Month to Live Builds a Magical Girl Harem and Ascends to the Throne, Makutsu No O in Obore Hi Orugoami No Kaihatsu Nisshi, 魔窟の王 淫溺妃オルゴアミーの開発日誌, Makutsu No Ou ~ Yomei Ichi Kagetsu No Doutei, Mahou Shoujo Harem Wo Kizuite Ou He Kunrinsu ~
Shouichi Shimizu, an ordinary man transported to another world, finds himself wandering a forest teeming with magical beasts. Just as his life is about to end, he is saved by a charming and mischievous fairy named Amy. Grateful for her kindness, Shouichi is granted survival skills to navigate this harsh new reality—but with one outrageous caveat: "You must bring a girl to climax once a month, or you’ll die." Lacking any romantic experience, Shouichi is initially horrified. Yet, under Amy’s playful persuasion and clever encouragement, he begins to confront the desires he’s long suppressed. From timid outcast to daring trailblazer, Shouichi embarks on a wild and risqué journey. Alongside Amy—a self-proclaimed expert in all things intimate—he navigates the challenges of his bizarre condition while striving to carve out a new life in this fantastical world. A hilariously bold tale of magical survival, desire, and personal growth, where the stakes are literally life or death! Can Shouichi rise to the challenge, or will his condition get the better of him?