Tutor fanfic, all27 main character 10027, is the story of 100 who wants to understand each other and 270. In another world line, he abducts 27 one step ahead and becomes 27's tutor.
Note: Because 27 forcibly inherited the ring, a small part of his soul was destroyed. The whole person is relatively sluggish and unable to think independently. He relies more on 100 and can avoid lightning on his own.
Purpose: Seeking self