Forced to Become a Pure and Innocent Female Pharmacist in Order to Cultivate Immortality

[Lighthearted + Pure Romance + No System + Transformation + Childhood Sweethearts] The male and female protagonists are reborn into another world at the same time, becoming childhood sweethearts living across from each other. During an accident while refining medicine, the protagonist unfortunately transforms himself into a girl, and from then on, he can only travel the cultivation world with the female protagonist as an innocent and pure girl. [This is a humorous cultivation novel.] [This book is expected to be completed in 3-5 million words.]