Girl group AtHeart’s 'Butterfly Doors' stage just dropped as a 'Show! Music Core' full-cam on MBCkpop — and it’s turning heads with bold styling and explosive energy.
On March 21, 2026, the video was uploaded to the MBCkpop channel as a full-cam version of 'Show! Music Core,' spotlighting each member’s individual charms.
In the video, the solid skills of Sohyun, Beom, and Arin stood out, while the unique vibes of Kaitlyn, Michi, and Nahyun shined. Fans reacted with comments like "The Music Core styling is the best—please dress them like this only!", earning widespread praise for the looks.
Many fans were moved by how AtHeart poured everything into the performance, and their stage gives viewers a massive energy boost. With a distinct appeal that sets them apart from earlier generations of girl groups, they are drawing major attention.
The full-cam is available on the official 'Show! Music Core' website and the MBCkpop YouTube channel. Their dazzling stage is also raising expectations for what’s next.