ONE N' ONLY is a 5, formerly 7 member JPop-boygroup under EBiDAN and Stardust Records. Before their debut 4 member were part of a group called EBBiSH and 3 of a group called Satori Boys Club (SBC). The group's vocalists are Eiku, Tetta and Rei. The rappers are Hayato and Naoya. Member Kohki left the group in November 2019 and Kenshin left the group in March 2025. Read more on