STAYC member Sieun drew attention on October 12 after sharing a set of new photos on her social media account. The post included the caption "What could my hobby be?" and showed her riding a bicycle and listening to LP records at a music café, according to Newsen.

What did Sieun post?

In the photos, Sieun wears a light blue halter-neck blouse, white short pants, and a ball cap. The outfit and relaxed setting gave the post a casual, summery feel.

Why are fans concerned?

While many commenters praised her appearance, others focused on how thin she looked. Comments on her shoulders and arms ranged from "she's too thin" to "please eat." The reactions reflect a wider pattern in which fans of K-pop idols often raise health concerns when a member appears noticeably slim.

Who is Sieun?

Sieun is the daughter of singer Park Nam-jung. She began acting as a child in 2014 with the EBS children's drama Pluto Secret Society. She later appeared in Six Flying Dragons and Beautiful Gong Shim. In November 2020, she debuted as a member of the girl group STAYC.

For international fans

Sieun's acting work includes several family-friendly dramas aired on Korean broadcasters, so international viewers interested in her early career may find them useful to look up. STAYC's music is available on major streaming platforms in many countries.