I.O.I’s ‘Gapjagi’ Leads ‘I.O.I : LOOP’ Comeback Release

I.O.I’s “Gapjagi” is the title track for the group’s third EP, “I.O.I : LOOP,” which is scheduled for release on May 19, 2026, at 6 p.m. through online music platforms. The release is the central music update in the I.O.I LOOP comeback, with the album arriving before the group’s Seoul concert dates at the end of May.¹

The comeback has been framed as I.O.I’s first new album in nine years, with a nine-member lineup listed for the project: Im Na-young, Chungha, Kim Se-jeong, Jung Chae-yeon, Kim So-hye, Yoo Yeon-jung, Choi Yoo-jung, Kim Do-yeon and Jeon Somi.² The EP contains six tracks, including the prerelease song “Useumyeo Annyeong (Recorded in 2016) (Prod. Jinyoung)” and the title track “Gapjagi.”³

‘Gapjagi’ Anchors the New EP

“Gapjagi” has been identified in multiple reports as a synth-pop track. The song is described as dealing with memories and longing that arrive without warning, and Jeon Somi participated in writing the lyrics.¹ Earlier tracklist coverage also confirmed “Gapjagi” as the title song and reported that the EP would include six songs.³

The rollout for the title track included a first music video teaser released through I.O.I’s official social media channels at midnight on May 6, 2026. Star News reported that the teaser opened with a scene in which Jeon Somi unexpectedly kisses Kim Do-yeon, while also describing “Gapjagi” as a synth-pop song about a sudden rush of longing.⁴

Ahead of the full EP, I.O.I released “Useumyeo Annyeong (Recorded in 2016) (Prod. Jinyoung)” on May 4, 2026, at 6 p.m. bnt News described the track as an archive recording containing the members’ voices from 2016. The same report said members including Jeon Somi, Chungha and Yoo Yeon-jung participated in work on album tracks, including the title song “Gapjagi.”⁵

Sports Kyunghyang later reported that I.O.I released an audio preview for all tracks on “I.O.I : LOOP” through official social channels on May 13, 2026. The preview contained highlights from the six-track EP and again positioned “Gapjagi” as a synth-pop title track, with Jeon Somi, Chungha and Yoo Yeon-jung among the members involved in album production.⁶

Key Facts About ‘I.O.I : LOOP’

The release timing and concert schedule give the comeback a compact rollout. The album arrives on May 19, followed by “2026 I.O.I Concert Tour: LOOP” at Jamsil Indoor Gymnasium in Seoul from May 29 to 31.¹ Korea JoongAng Daily also reported the same Seoul concert window when announcing the third EP and described the project as part of the group’s 10th anniversary comeback tour.²

Release Timeline and Concert Link

The tracklist was reported after Swing Entertainment disclosed it through I.O.I’s official social media at midnight on April 27, 2026. That update confirmed “Gapjagi” as the title song, the six-track album structure, the May 4 prerelease plan and the May 19 full release at 6 p.m.³

The prerelease song then arrived on May 4, followed by the “Gapjagi” music video teaser on May 6 and the full-album highlight audio preview on May 13. Those steps placed the title track at the center of the final lead-up to the EP.⁵⁴⁶

The reported nine-member lineup does not include all original I.O.I members. Available source material identifies the participating lineup as Im Na-young, Chungha, Kim Se-jeong, Jung Chae-yeon, Kim So-hye, Yoo Yeon-jung, Choi Yoo-jung, Kim Do-yeon and Jeon Somi, without adding further explanation in the provided reports.²

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Cloi Lee

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