Japanese title:天の仙人様 A Japanese cultivation novel about sage cultivation. (It seems to be very different from Chinese and Korean cultivation novels. There are seemingly no cultivation realms but there are basically stages of success) note: This is one of the biggest novels on Syosetu. Although the main character is pure he is more straightforward seemingly than the other Japanese protagonists. At least that's what it seems in chapter 10. Summary: The main character has a very pure soul and upon his death, he is told that he can't enter heaven. For not being good to his parents. So he is basically told that he can either marry king Yama's daughter for being so pure or be trained by a tengu and basically enter heaven by becoming a cultivator in his next life. He chooses to be a cultivator. https://ncode.syosetu.com/n6327dz/