Kishi Teppei is a tennis player in Kanagawa. He is first introduced in a match against Eiichirou Maruo in the third Kanagawa Junior Tennis Circuit where he was the 5th seed.

Season 2 of Baby Steps. Maruo Eiichirou has begun his training in America and quickly realizes that he has still a long way to go. Facing his comrades in the daily matches helps him to realize his own weaknesses and his time overseas proves to be extremely valuable for his development, both as a tennis player and as a person.