To put it simply, it is the story of an old monster who has lived for a long time and Shinichi, Seiichi, Genichiro, and Tetsuro.
This is a story that has existed in my fantasy time since I fell in love with Shinichi since I was a child. -_-, From the beginning, it was a slight Mary Sue because of my young age. Although it was very slow, it has been continuously improved for ten years now. This is the pillar of my spiritual world. Although the writing is not good, I don't want my imagination to rot in my stomach, so I wrote it out...