The introduction to the book starts with Shibuya Miko explaining why Yuuri is named "Yuuri"(有利, profitable). She says when she was in labor a handsome young fencer picked her up in his taxi and that he tried to comfort her by telling her babies born in the summer grow up to be strong and that where he was from July is called "Yuuri". As soon as she heard the word she decided that it was going to be his name. She says that is the reason she chose that name and it had nothing to do with his father being a banker and being obsessed with profits.