On his way back from the high school entrance ceremony, Haruki, who was blown away to a different world by a truck, experiences excitement briefly before being reduced to a s*ave. After somehow managing to survive, Haruki was immediately left in despair. His hobbies included reading manga, playing games, and watching anime—he’s what you would call an avid otaku. But in this world, those things don’t exist. In the midst of his listless days, a dream from his past resurfaces one day. A harem. He wanted to have intimate encounters with various girls—girls with large breasts, big buttocks, cute girls, beautiful girls. In this harsh world, to build a harem, he had no choice but to rise to the top. He needed strength, wealth, and power. To realize his harem, Haruki aimed to climb the path of becoming an adventurer.