Taigi Asano plays the trombone for the Funabashi High School Brass Band. He has a bright, kind, and honest personality. He also gets along well with the other brass band members. He enjoys his time with the band and the influence of Music Teacher Kenichi Takahashi. One day, Taigi takes on the challenge to create a cheering song for the high school baseball team. With Kenichi's support, Taigi creates the fight song "Ichifuna Soul." After graduating high school, Taigi enters a university and dreams of becoming a teacher like Kenichi. While experiencing campus life at his university, Taigi feels something wrong with his body. He goes to see a doctor and learns that he has cancer.