Set in a remote fantasy realm, the two alchemist girls Colette and Priscilla work on perfecting a formula that harnesses men's sperm, with Colette taking the lead in collection using her big boobs to entice contributors. In episode 2, she delves into using Oral and creampie methods to ensure a bountiful harvest of the essential ingredient. The hentai portrays their dedicated efforts in the mountains, where every interaction builds toward greater alchemical success and deeper satisfaction.