[Photo] AtHeart Nahyun-Arin coordinate flawlessly

Group AtHeart held a release showcase for "3! 4!" and a multi-form drama production presentation at the RYSE Autograph Collection in Seogyo-dong, Seoul, on the afternoon of the 19th.

AtHeart (Michi, Arin, Katelyn, Bom, Seo-hyeon, Aurora, Nahyun) expands its universe with the second single of the "TIME TRAVEL PROJECT," "3! 4!," and the time-slip adventure drama "3+4!," telling the story of young people from different eras running toward the same dream.

AtHeart's Arin and Nahyun perform "3! 4!." Aug. 18, 2026

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