Blue Symphony is an original song from THE IDOLM@STER LIVE THE@TER PERFORMANCE 04. It is performed by Chihaya Kisaragi, Shiho Kitazawa, Kotoha Tanaka, and Megumi Tokoro.
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Mirai Kasuga - project-imas wiki
THE IDOLM@STER CINDERELLA MASTER 011~015 - project-imas wiki
Crescendo Blue - project-imas wiki
Life is HaRMONY - project-imas wiki, runway de waratte wiki
Life is HaRMONY - project-imas wiki, runway de waratte wiki
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The Smurfs - Wikipedia
Yuki Nagano - project-imas wiki, death march kara hajimaru isekai
Project Imas - CGSS - Hisakawa Sisters by PixelinPlanet on DeviantArt
Museum of Discovery & Science