I.O.I released the mood film video for their third mini-album 'I.O.I : LOOP' at midnight on the 22nd through their official SNS. The video features members Lim Nayoung, Chungha, Kim Sejeong, Jung Chaeyeon, Kim Sohye, Yoo Yeonjung, Choi Yoojung, Kim Doyeon, and Jeon Somi dressed in colorful outfits creating a vintage atmosphere. The video also includes each member's English name along with the album release schedule set for May 19 at 6 PM.

I.O.I is a project group formed through public voting on Mnet's 'Produce 101' in 2016, and they received much love as the "Nation's Girl Group" right after their debut. Marking their 10th anniversary this year, I.O.I announced their reunion after 9 years. On the 21st, they released a promotion scheduler and confirmed the album release date as May 19.

Along with the new album release, I.O.I will hold the '2026 I.O.I Concert Tour: LOOP' to meet global fans. The concert will start in Seoul for three days from May 29, followed by shows in major Asian cities including Bangkok on June 6 and Hong Kong on June 20 and 21. The 'I.O.I : LOOP' album will be released on various online music platforms at 6 PM on May 19. A pre-release single will be unveiled on May 4.