ONE N’ ONLY has announced that it has signed a worldwide contract with Universal Music/Polydor Records and will make its major label debut on June 18.

This was announced at the premium event “ONE N’ ONLY Special Event ~Sweet Evening~” held today, April 7, at the Hotel InterContinental Tokyo Bay in Tokyo. The dress code for the event, to which 250 members of the official fan club “SWAG” were invited by drawing, was white, the group’s color, and the event was broadcast live via the group’s official YouTube, TikTok, and Instagram.

The members opened the scroll handed to them by the staff to report their major debut to SWAG (the name of ONE N’ ONLY fans). The background of the scroll was a picture of a world map, which showed the expectation for ONE N’ ONLY’s activities to spread their wings to the whole world.

In addition to the title song (title undecided), which has an impressive melody with a loud and addictive chorus that is typical of the aggressive One En, the first major single will include “BOOM BASH,” the theme song for the “LIVE TOUR 2025 ||:ONE N’ ONLY:||” tour that will start on April 15, as well as ” Bittersweet” will be included. BOOM BASH” will be distributed in advance on April 18.