ONEUS Seo Ho completes military service, group preps mini album 12 'FIRST LIGHT : 井' and 21-city world tour

Seo Ho is back, and ONEUS has a full lineup again

ONEUS main vocalist Seo Ho (이서호, 29) was discharged from the Army 50th Infantry Division on August 16, 2026. His service ran from February 17, 2025 to that date. The group is preparing mini album 12 FIRST LIGHT : 井 for a fall 2026 release.

They'll also launch their third world tour, FULL MOON, starting in Seoul and moving through 21 cities worldwide. Beyond the Seoul date, no other city announcements have come yet.

From Busan to the barracks — and back to the stage

Seo Ho was born June 7, 1996 in Busan and raised in Daejeon. He debuted with ONEUS on mini album 1 LIGHT US in January 2019. Writing credits include Dizzy (혼란하다 혼란해), Leftover (식은 음식), and Rupert's Drop (루퍼트의 눈물). Before enlisting, he released a solo single called Hatchling.

During service, he joined the Army Performance Team and performed at the Gyeryong Military Culture Festival and the Chilgok Nakdong River Battle Victory Commemoration. He earned special-class soldier status for his conduct. (The Army Performance Team credit is a flex, honestly.)

Seo Ho said he devoted himself to practice to close the gap left by his absence. He pledged to "show better vocals and performance on stage with the complete group" and repay fans for their long wait.

What's on the slate

Recent releases and what's coming:

• Mini album 11 5x — released 2025
• Single album 原 — released 2026
• Mini album 12 FIRST LIGHT : 井 — fall 2026 (upcoming)
• World tour FULL MOON — 21 cities, starting Seoul (upcoming)

With Seo Ho back and the album in prep, ONEUS heads into their biggest touring run yet as a full unit.