The situation
Chaeyoung of fromis_9 and Isa of STAYC collaborated on a dance challenge for "Vitamin ME". The video, posted on YouTube, features the two idols performing a high-energy routine. This unexpected pairing has generated interest among fans of both groups.
What the internet did with it
- — "isa's facial expressions are everything, she really brought the *_사이다_* (a refreshing or satisfying moment) to this challenge"
- The dance challenge video was uploaded to the M COUNTDOWN YouTube channel, with the description including a link to the full episode.
- Some fans noted that the chemistry between Chaeyoung and Isa was impressive, given that this is their first public collaboration.

The open question
The status of future collaborations between fromis_9 and STAYC members remains unclear, with fans waiting for an official statement on potential joint projects or performances.
📸 Additional Photos
