SEOUL, March 21 (UPI) -- K-pop superstars BTS returned to the stage Saturday night with a free comeback concert in central Seoul, marking their first full-group performance in nearly four years following the completion of their mandatory military service.

The one-hour show, titled "BTS The Comeback Live: Arirang," was held at Gwanghwamun Square and livestreamed globally on Netflix, drawing tens of thousands of fans to the historic site and millions more online.

The performance came a day after the release of Arirang, the group's first studio album since 2022, which sold 3.98 million copies in its first 24 hours, according to the group's agency BigHit.

"I can't believe the seven of us are all standing on this stage today," J-Hope told the crowd. "We know it's been a long wait. Thank you for waiting for us."

Staged against the backdrop of Gyeongbokgung Palace, the concert featured a large-scale production with a modern arch structure and a light show illuminating the historic facade.