The Young Master of the Miyano Family

I'm a newbie. I just wrote a book. I wrote it for fun during the holiday. The protagonist is a time traveler who grew up in an organization. Because of his older sister and younger sister, he makes inventions, makes medicines, kills people, and collects intelligence in the organization... Gin once said: If it weren't for the two of them, he stayed in the organization, I'm afraid the organization would have ceased to exist." And he personally sued the boss: "Quit the organization" boss: "... Okay" This book exists because I wrote it randomly. I wrote this book because I wanted to have a book to read. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.