Sutamyu - Koukou Seikageki

The series tells the story of five students, Hoshitani Yuta, Nayuki Toru, Tsukigami Kaito, Tengenji Kakeru, and Kuga Shu as they struggle to enter the musical department of Ayanagi Academy, a school focusing on music. They want to be accepted to the Star Frame Class, which is directly taught by the members of the Kao Council, the most talented students from the musical department who stand at the top within the academy. Luckily, they are spotted by Otori Itsuki, one of Kao Council members who puts them on his Star Team.

This manga goes in-depth into some of Team Otori's issues/history which were untold in the anime.