On March 4, 2025, Stardust Promotion officially announced the termination of its management contract with Kenshin Kamimura due to serious compliance violations. The agency issued an apology to fans and those involved, expressing regret for the situation.

Shortly after, ONE N’ ONLY’s official website confirmed Kamimura’s departure from the group, citing the same reason. As a result, the group’s upcoming LIVE TOUR 2025「||: ONE N’ ONLY :||」 will proceed with five members, and no refunds will be issued for tickets.

Fans, known as SWAG, have expressed sadness over the sudden news, with many hoping that Kamimura can continue pursuing a career in music and acting under a new agency in the future.