ONEUS is finally back as a complete group, and their comeback couldn’t have come at a better time for fans who have waited nearly two years to see all five members on stage together again. On September 23, 2026, the K-pop boy band released their 12th mini album “FIRST LIGHT : 井” and its title track “Say Yes!”, marking their first full-group release since member Seoho completed his mandatory military service. This comeback is more than just new music: it’s also ONEUS’s first era under a brand-new agency, and it kicks off a massive world tour that will take the group across four continents. Here’s everything K-culture fans need to know about the comeback, the album, and where to catch ONEUS live in 2026 and beyond.
Who Is ONEUS, and Why Does This Comeback Matter?
ONEUS is a five-member South Korean boy group made up of Seoho, Leedo, Keonhee, Hwanwoong, and Xion. They debuted in January 2019 with the mini album “Light Us” and quickly built a reputation as one of fourth-generation K-pop’s most consistent performers, known for hits like “Valkyrie,” “No Diggity,” and “Luna,” plus a star turn on Mnet’s competition show “Road to Kingdom.” The group has always leaned on powerful choreography and a wide range of concepts, from fierce and dramatic to bright and playful. What makes this comeback special is timing: member Seoho spent 2025 and part of 2026 completing mandatory military service, so “FIRST LIGHT : 井” is the first time all five members have promoted together in about a year and eight months.
Seoho’s Military Service Timeline and Return
Seoho, ONEUS’s main vocalist, enlisted for mandatory active-duty service in South Korea’s military in February 2025. Like every able-bodied Korean man, his service was required by law, and it meant ONEUS spent the following year and a half promoting as a four-member unit rather than delaying activities entirely. The group actually kept busy during the gap, releasing the 11th mini album “5x” and the digital single “Won” as a four-piece so momentum wouldn’t stall. Seoho completed his service and was discharged in mid-August 2026, and within weeks the full group was already teasing a comeback. For longtime fans, seeing all five members share a stage again is arguably the biggest story of this era, even bigger than the new music itself.

Inside “FIRST LIGHT : 井” and the Title Track “Say Yes!”
ONEUS’s 12th mini album “FIRST LIGHT : 井” dropped on September 23, 2026 at 6 p.m. KST, and it’s built around a simple but poetic idea: a well (井, pronounced “jeong”) that holds onto the light ONEUS and their fandom, TOMOON, have reflected onto each other over the years. The five-track EP is led by the title song “Say Yes!” (also referred to in Korean coverage as “Don’t Look Away”), produced by hitmaker R.Tee, which is about the confidence that comes from facing a new beginning together. The rest of the tracklist includes “Runaway,” “By Chance,” “Never Ending Us,” and “We Run for Youth,” and members Hwanwoong, Leedo, and Keonhee all contributed to writing and composing several songs, continuing ONEUS’s tradition of hands-on involvement in their music.

A New Chapter Under B.WAVE Entertainment
This comeback also marks ONEUS’s first release under a brand-new label. In January 2026, the group and their longtime agency RBW mutually agreed to end their exclusive contracts, and the five members chose to stay together and keep promoting as ONEUS independently rather than disband or go separate ways. The following month, they signed with B.WAVE Entertainment, which also acquired the intellectual property tied to the ONEUS name and back catalog from RBW. “FIRST LIGHT : 井” is the group’s first full-length comeback since that transition, which is part of why the agency and members have talked about this era as a genuine fresh start rather than just another release.
The 2026 World Tour “FULL MOON”: Where to See ONEUS Live
ONEUS isn’t stopping at a comeback stage. The group is launching the 2026 ONEUS WORLD TOUR “FULL MOON,” which opens with two hometown shows in Seoul on October 24 and 25, 2026. From there, the tour heads to Latin America and then a run of European dates in November, including stops in Berlin, Amsterdam, Paris, Milan, Vienna, and Stuttgart. North American fans get their turn in December, with confirmed stops including New York City, before the tour continues into early 2027 with dates in Tokyo and Taipei. It’s one of the more ambitious global rollouts ONEUS has attempted, spanning four continents in just a few months, and it’s designed to let the group reconnect with the international fanbase, or TOMOON, they built up over years of touring even before Seoho’s enlistment.

ONEUS Comeback FAQ
Is this ONEUS’s first comeback as a complete group in years?
Yes. ONEUS released two projects as a four-member group while Seoho was serving (the mini album “5x” and the single “Won”), but “FIRST LIGHT : 井” is their first release and full promotional cycle with all five members since Seoho’s return from military service in mid-2026, making it their first true full-group comeback in about a year and eight months.
Where can I stream “Say Yes!” and the FIRST LIGHT album?
“FIRST LIGHT : 井” is available on all major streaming platforms, including Spotify, Apple Music, and YouTube Music, and the music video for “Say Yes!” is up on ONEUS’s official YouTube channel. The album released worldwide at 6 p.m. KST on September 23, 2026, so it’s already fully out for international fans.
Will ONEUS tour North America on FULL MOON?
Yes. After opening in Seoul on October 24 and 25 and touring Latin America and Europe in November, the “FULL MOON” world tour is scheduled to reach North America in December 2026, with New York City among the confirmed stops, before wrapping in Tokyo and Taipei in early 2027.
Between Seoho’s return, a new agency, a genuinely catchy title track, and a world tour that spans four continents, “FIRST LIGHT : 井” feels less like a routine comeback and more like the start of ONEUS’s next chapter. For TOMOON who have waited through the gap, this era delivers on almost every front: new music, a reunited lineup, and a real chance to see all five members live again. Whether you’re discovering ONEUS for the first time through “Say Yes!” or you’ve been following them since “Valkyrie,” this is a good moment to jump back in.
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For more on the group’s history and discography, see ONEUS’s Wikipedia page.













