A2O SOUL released "SUPERSTAR" on October 13, 2026, a pre-release single from the fifteen-member group's upcoming debut album. The song came out the same day its sister group A2O LITE debuted, a day after the two acts were introduced together at a joint showcase, Welcome to Soulite, at KINTEX in Ilsan. Both groups are produced under Lee Soo-man at A2O Entertainment, with Yoo Young-jin overseeing their music and performances.
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A2O SOUL is a South Korean boy group formed by A2O Entertainment, with SM Entertainment founder Lee Soo-man as its key producer and longtime SM producer Yoo Young-jin overseeing its music and performances. The fifteen-member lineup was launched alongside the girl group A2O LITE as part of a single project, and together the two groups bring in members from five countries with an average age of about fifteen. The groups were introduced at a joint global debut showcase, Welcome to Soulite, held at KINTEX in Ilsan on October 12, 2026, an event that marked Lee Soo-man's first official public appearance in Korea in more than two years. A2O SOUL released its first song, "SUPERSTAR," on October 13, 2026, as a pre-release from its debut album. A2O has said it plans to connect the two acts through a shared fictional universe that links their music, performances, and storylines while keeping each group's identity separate.