It is called "Untitled" on 36rain, Meihuawu and my blog. Because the kid "Jiuyuan" is a completely original character, naming an article after him is really inappropriate in a fan forum... So, the official introduction is as follows.
The main text is the story of Yama Hanba and Jiuyuan. I want them to be happy.
The extra stories are other people's stories, probably all related to Jiuyuan. The second extra chapter is entirely out of resentment towards a certain sentence of a certain red-haired monster, please do not go into details.
There are divergences from the original plot, so please do not delve into it further.