Girl group At Heart (Michi, Arin, Caitlin, Bom, Seohyun, Aurora, Nahyun) is visiting music fans this summer with a summer song exuding a strong Y2K sensibility.

On the 8th, At Heart revealed the HEARTPIECE video for '3! 4!,' the second single from their 'Time Travel Project,' through their official SNS.

This video was produced in a vintage self-cam format with a noise filter added. In particular, it captures the members freely playing around on the set of their concept photo shoot, radiating bright and positive energy, which draws attention. At the end of the video, a portion of the performance for the new song '3! 4!' was revealed, further heightening public anticipation.

The Time Travel Project is a global remake project that reinterprets hit songs released in 1996 in At Heart's own unique color. At Heart previously achieved success by entering the Melon Hot 100 chart with their first single, 'Say It.' This time, they plan to continue their upward momentum by remaking '3! 4!,' a mega-hit song by the representative 90s girl group RooRa.

Meanwhile, At Heart's Time Travel Project second single '3! 4!' will be released simultaneously on global music streaming sites on the 19th at 6:00 PM.

Photo = Titan Content.