One of the etudes in the book is also titled Hibike! Euphonium, and is Asuka's favorite. She is seen practicing it outdoors in the Episode 3 of the second season of the anime, and plays it again for Kumiko in Episode 9. The melody of the Hibike! Euphonium is a recurring theme in the soundtracks of the anime's second season, and is particularly pronounced in track 28: 重なる心 (Overlapping Hearts), from the soundtrack of the first season. Upon graduating, Asuka gives the book to Kumiko Oumae, saying that she now has more use for it than herself.