To celebrate the release of ONE N’ ONLY’s second major-label album, *MEGA GOLDEN*, the “ONE N’ ONLY ‘MEGA GOLDEN’ POP-UP STORE” will be held in three cities across Japan—Tokyo, Osaka, and Aichi—starting November 4, 2026! The venue, designed to evoke the world of “Golden Sun,” will feature costume displays, member visuals, photo spots, and a game corner, and will also sell original merchandise such as acrylic stands and T-shirts.