In a world where a government-approved school club actively promotes student pregnancies and fertility activities, self-proclaimed otaku Ao Sutou finally joins the "Kosuzukuri Ninkatsu-bu" after a tough selection process. His lifelong dream? Find the perfect partner and build a loving family. But fate has a twist: his assigned partner is none other than Hami Toono — the stunning gyaru classmate who constantly mocks him as "Otaku-kun" and treats him with icy disdain. As tensions rise in the club room, Ao's hidden desires ignite, turning cold rejection into heated encounters driven by unstoppable breeding urges in this bold, adult-oriented hentai series blending school life, gyaru-otaku dynamics, and explicit impregnation themes.