They made their official debut on July 27, 2022, with the release of their first extended play (EP) Sequence: 7272.

[8] The group made their broadcast debut on Mnet's M Countdown on July 28 to perform "Pop?

[11] CSR released their Korean second extended play Delight, with its lead single "Shining Bright", on March 29, 2023.

[13] The group released a special digital single "HBD To You (Midnight Ver.)"

[14] On December 22, it was announced that the group would be active as a trio (Sihyeon, Yuna, Sua) for the time being, as the remaining four members were in an overseas schedule.

[17] On April 6, Duna was eliminated in the final episode, finishing 14th overall with 25,093,428 points, thus being unable to debut with Gen1es.