Kiss of Life released their second single album, Who Is She, on April 6, 2026, with the title track of the same name. "Who Is She" is a dance-pop song that reworks an early-2000s feel for a modern sound, built around a simple but pointed question about identity. Kiss of Life debuted in 2023 under S2 Entertainment.
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KISS OF LIFE is a four-member girl group formed by S2 Entertainment, consisting of Julie, Natty, Belle, and Haneul. They debuted on July 5, 2023 with the EP "Kiss of Life" and its lead single "Shhh," following a member-by-member rollout that introduced each artist individually before presenting the full group. The members bring varied backgrounds, including soloist and songwriting experience, which feeds an R&B-leaning sound that drew early critical attention for its vocal focus. Follow-up releases such as "Born to Be XX" and singles including "Sticky" expanded their catalog and built a growing international audience. Known for strong vocals and a versatile concept range, KISS OF LIFE established themselves quickly as one of the more closely watched girl groups of K-pop's fifth generation, frequently cited among the standout rookie acts of their debut period.