Cinderella Sengen!

 (シンデレラ宣言!; Cinderella Declaration!) is an idol group formed in November 2020.

They are the sister group of Schrödinger no Inu, Lateral Arc, Alcute! and a founding member of the Cinderella's Dog Project.

On July 10, 2021, the group announced their major debut under the label PONY CANYON. Their released their first major single on November 17, 2021.

Members

 * YUNA (Founding Member)
 * SUZU (Founding Member)
 * RICO (Founding Member)
 * CHINA (Founding Member)
 * HARU (Founding Member; Graduating August 16, 2023)
 * YUME (Joined March 3, 2021; Graduating August 16, 2023)
 * NUU (Joined March 3, 2021)
 * NANA (Joining August 18, 2023)
 * RON (Joining August 18, 2023)

Singles

 * 1) [2021.11.17] Cinderella Sengen! / Asagao Shangri-La / Hanikami Sunset (シンデレラ宣言! / 朝顔シャングリラ / はにかみサンセット)

Digital Singles

 * 1) [2021.01.18] Cinderella Sengen! (シンデレラ宣言!)
 * 2) [2021.04.04] Hyaku Thank You! (ひゃくてんきゅー!)
 * 3) [2021.05.12] 7-Kaime no One Piece (7回目のワンピース)
 * 4) [2021.05.12] DokiDoki! Heartbeat!! (DokiDoki！はーとびーつ!!)
 * 5) [2021.05.12] pastel shade
 * 6) [2021.05.12] Cinderella Kakumei -Revolution- (シンデレラ革命 -Revolution-)
 * 7) [2021.05.12] Kimiiro Fantasy (君色ファンタジー)
 * 8) [2021.05.12] Renai Labyrinth (恋愛ラビリンス)
 * 9) [2021.05.12] Niji (虹)
 * 10) [2021.07.16] 7-Kaime no One Piece (7Ver. remix) (7回目のワンピース (7Ver. remix))
 * 11) [2021.07.16] DokiDoki! Heartbeat!! (7Ver. remix) (DokiDoki！はーとびーつ!! (7Ver. remix))
 * 12) [2021.07.16] pastel shade (7Ver. remix)
 * 13) [2021.07.16] Cinderella Kakumei -Revolution- (7Ver. remix) (シンデレラ革命 -Revolution- (7Ver. remix))
 * 14) [2021.07.16] Kimiiro Fantasy (7Ver. remix) (君色ファンタジー (7Ver. remix))
 * 15) [2021.07.16] Renai Labyrinth (7Ver. remix) (恋愛ラビリンス (7Ver. remix))
 * 16) [2021.07.16] Tsuioku Fragment (追憶フラグメント)
 * 17) [2021.08.18] day dream
 * 18) [2021.10.10] Momoiro Soda (ももいろソーダ)
 * 19) [2021.10.20] Cinderella Sengen! (7-nin Ver.) (シンデレラ宣言！(7人Ver.))
 * 20) [2021.11.03] Asagao Shangri-La (朝顔シャングリラ)
 * 21) [2021.12.09] Renjou Princess (恋情プリンセス)
 * 22) [2021.12.09] Time Leap (タイムリープ)
 * 23) [2022.04.04] Cinderella Sengen! Don't stop! (シンデレラ宣言！Don't stop!)
 * 24) [2022.06.27] Oshi!!!!! (推し!!!!!)
 * 25) [2022.07.04] Hoshikage Parade (星影パレード)
 * 26) [2022.07.04] Natsunanoda! (夏なのだっ!)
 * 27) [2022.12.09] Myohontosuke ga Hajimannai!!! (ミョーホントゥスケがはじまんないっ!!!)
 * 28) [2022.12.09] Zutto Gyutto (ずっとぎゅっと)
 * 29) [2022.12.23] Shirayuki Cinderella (シラユキシンデレラ)
 * 30) [2023.04.01] AMULET (as SIN-SEN)
 * 31) [2023.05.18] Zettai! Kimidake Sengen! (絶対!君だけ宣言!)

Trivia

 * On April Fools in 2023, the group changed their name to SIN-SEN with the group's concept featuring a darker image along with a heavy rock sound, the same day the group released their first single "AMULET".
 * The change was later revealed to be temporal and only until after their "Super April Fool's Festival 2023" concert the next day.