The spin-off novel of the Hibike! Euphonium series titled Hibike! Euphonium Series Rikka Koukou Marching Band he Youkoso Zenpen (響け! ユーフォニアムシリーズ 立華高校マーチングバンドへようこそ 前編, lit. Sound! Euphonium Series: Welcome to the Rikka High School Marching Band Prequel) It was released on August 4, 2016.
The story focuses on Rikka High School Marching Band. Azusa Sasaki, Kumiko's friend from the middle school, is the main character of this novel. The story is set in about the same time as the main series but it is told from Rikka High School's perspective instead of Kitauji's.
- By order of appearances: