Colette, a girl who lives quietly with her master in the mountains of a certain country. What she is learning from her master, Priscilla, is alchemy, not alchemy!? Alchemy is an epoch-making technology that synthesizes items using the semen of living things. But Colette is still half-baked with no sex experience. Colette was able to become a full-fledged alchemist thanks to Priscilla's somewhat aggressive guidance. Priscilla gave Colette a gift when she became a full-fledged woman. “My atelier……!?” Now that she has her own studio, Colette works hard. However, on a certain quest, she was prevented from accomplishing it by a powerful monster. A huge breasts beautiful girl hero appeared in front of the troubled Colette! Alchemy using semen = alchemy How much of a paradise is it to feel good and earn money!?