ONE N' ONLY

 is a six member group formed by Stardust Promotion. The group is composed by the union of EBiSSH and Satori Boys Club. It was founded when they had their first tour together in April 2018.

They debuted on May 7, 2018 with I'M SWAG.

Vocalists

 * TETTA (関哲汰, Seki Tetta)
 * REI (沢村玲, Sawamura Rei)
 * EIKU (山下永玖, Yamashita Eiku)

Rap&Dancers

 * HAYATO (高尾颯斗, Takao Hayato)
 * KENSHIN (上村謙信, Kamimura Kenshin)
 * NAOYA (草川直弥, Kusakawa Naoya)

Former Members

 * KOHKI (林幸輝, Hayashi Kouki) (Left December 31, 2019)

Albums

 * 1) [2020.04.15] ON'O

Singles

 * 1) [2018.11.21] I'M SWAG
 * 2) [2019.05.08] Dark Knight
 * 3) [2019.10.16] Category / My Love

Digital Singles

 * 1) [2020.10.14] JUST LIKE ME
 * 2) [2021.01.20] L.O.C.A
 * 3) [2021.06.09] Video Chat

Trivia
Their music videos reached a million views in less than 24 hours and their single Dark Knight placed first on both the Oricon chart and Japan Billboard Top 100.

Their fandom name is Swag.