Kenichi Saitou is Koyuki's mentor both in music and swimming. Izumi introduces the two of them.
Personality
Relationships
Momoko: Momoko is Mr. Saitou's love interest in both the manga and anime.
Koyuki: Koyuki looks to Mr. Saitou as a mentor. He ends up writing the lyrics to one of BECK's songs.
Izumi: Izumi was coached by Mr. Saitou. She respects him as a talented athlete with the ability to motivate others.
Plot
Manga Plot
Izumi introduces Koyuki to Mr. Saitou.