On March 19, 2026, Billboard Korea announced via Instagram that K-pop rookie girl group AtHeart visited the Billboard Korea House. Showcasing their appeal with their latest digital single 'Butterfly Doors', AtHeart made a headline-grabbing stop that fans couldn’t ignore.
In the released photos, an AtHeart member commands attention with a charismatic smile and a confident pose. You can also see how the group filled every corner of the House with their charm.
Fans are on fire. Reactions like "MY CUTIES" and "STREAM BUTTERFLY DOORS GUYS" keep pouring in. Billboard Korea’s post once again underscores AtHeart’s rock-solid talent.