H1-KEY wows Waterbomb Seoul with powerful live vocals and “Summer Was”
H1-KEY stunned the crowd at Waterbomb Seoul 2026 with powerful live vocals and fresh visuals, closing their set with the summer anthem “Summer Was” and earning strong fan reactions.
The group performed on July 26 on the outdoor global stage at KINTEX in Goyang, Gyeonggi Province.
Members Seoi, Riina, Hwiseo, and Yel took the stage together, delivering a high-energy set that included “Rose Blossom,” “Let’s Get Hot,” and “To. My First Love.”
They also performed “Good for U” and ended with their signature summer song “Summer Was,” mixing vocal strength with choreography that brought a bright, summery mood.
H1-KEY added a fresh take on SISTAR’s “SHAKE IT,” combining the original’s cool summer feel with their own upbeat energy.
The group drew attention with colorful styling, lively stage manners, and a youthful presence that prompted enthusiastic cheers throughout the performance.
Earlier this year, H1-KEY released their fifth mini-album ‘LOVECHAPTER’ featuring the title track “To. My First Love.”
They recently held their first fan meeting in Japan titled ‘THE FIRST KEY’ and were appointed official ambassadors for the ‘IEF 2026 International eSports Festival.’