Renseijutsushi Colette no H na Sakusei Monogatari

Based on the erotic RPG game by acerola.

Colette has been living a happy life as an apprentice alchemist, but when a mysterious stranger pays her master Priscilla a visit, Priscilla sets out on a journey. With her master gone, it's up to Colette to inherit the workshop and help those in need while also embarking on adventures of her own!

(Source: Steam)