Each point is a rolling 30-day score ending on that date, sampled weekly. May differ from the window composite above.
H1-KEY is a South Korean girl group formed by Grandline Group (GLG) in partnership with Sony Music Korea. The group made its debut on January 5, 2022, with the single album Athletic Girl. H1-KEY currently consists of four members: Seoi, Riina, Yel, and Hwiseo, who perform across vocal and rap roles. Founding member Sitala departed in May 2022, and Hwiseo joined the lineup shortly afterward. Working within contemporary pop and R&B, the group is known for message-driven title tracks addressing themes of self-worth and encouragement. H1-KEY released the extended play Rose Blossom in January 2023, and earned its first music show wins with "Seoul (Such a Beautiful City)" from the EP Seoul Dreaming later that year. Subsequent releases include the single "Love or Hate" in 2024 and the EP Lovestruck in 2025, continuing a body of work built around vocal-forward pop and self-affirming lyrical themes.