I'm very happy to recommend a Conan Doujin novel to you. Although I'm not sure if it's the one you're looking for, you can try reading When Gin Becomes a Reincarnator. The plot of this novel was about a person who had just become a God. In the process of developing the God's Space, he sent Gin, who was known as a model worker, into the reincarnation space. I hope this book can help you find your childhood memories and it will be interesting to read. I hope you like this fairy's recommendation. Muah ~😗