Yumeiro Sinfonia

 (ゆめいろシンフォニア; formerly 夢彩シンフォニア), formerly known as ICR Kenshuusei (ICR研究生), is an idol group formed in May 2021.

They were formed as ICR Kenshuusei (ICR研究生) in May 2021 and held their debut live on June 6, 2021.

They rebranded to Yumeiro Sinfonia (夢彩シンフォニア) on September 26, 2021 and held their debut live on October 3, 2021.

They changed their name again to Yumeiro Sinfonia (ゆめいろシンフォニア) on April 30, 2022.

Current Members

 * Himari Kiho (向日葵きほ; ) (Joined June 6, 2021)
 * Yuki Miya (夕稀みや; ) (Joined September 2021)
 * Hane Rurika (羽響るりか; ) - Support member (Joined June 19, 2023)
 * Shirasaki Rei (白紗希れい; ) (Joined September 30, 2023)

Former Members

 * Utsuki Reni (兎月れに) (Founding Member; left July 2021)
 * Shijou Nia (獅城にあ) (Founding Member; left August 5, 2021)
 * Suzumiya Asuna (涼宮あすな; ) (Founding Member; left December 30, 2021)
 * Amane Tsuki (天音つき; ) (Joined November 7, 2022; Graduated May 28, 2023)
 * Saionji Hinata (西園寺ひなた; ) (Founding Member; Withdrew June 23, 2023)
 * Seina Maria (星那まりあ; ) (Joined October 1, 2022; Withdrew June 23, 2023)

Digital Singles

 * 1) [2022.06.05] Kimi no Tame ni Kawaiku Naritai (君のために可愛くなりたい)
 * 2) [2022.08.07] Yumeiro note (夢彩note)
 * 3) [2022.11.22] Smile Days (スマイルデイズ)
 * 4) [2022.12.03] Don't worry, be happy!