H1-KEY (하이키) is a South Korean girl group under Grandline Group and Sony Music Korea.
The group currently consists of 4 members: Seoi (서이), Riina (리이나), Hwiseo (휘서), and Yel (옐). On May 24, 2022, former member Sitala (시탈라) left the group due to personal reasons and Hwiseo was added to the group on June 6, 2022
They debuted on January 5, 2022 with the release of the digital single "Athletic Girl".
The group had their first comeback on July 6 .
