This is a live album of the one-man live"Chiaki Mayumura Chiaki's Ongakutai" held at Nakano Sunplaza on September 17, 2021. It features the participation of Shu Kanematsu (Key), Shunsuke Ochi (Ba), Ryo Konishi (Sax), Yusuke Yoshida (Dr), and qurosawa (Gt), all young and talented musicians who are leading the way of the times. The live video is included in the album"ima" limited edition (CD+BD) released on Feb. 23.