STAYC's Sieun and Yoon guest in Sandara Park & Park Sohyun "Unnies Without Appetite" variety show. The main concept of the show is to talk about hardships of Idol/Actor life while enjoying meal, another goal is to help picky eaters/small eaters to enjoy food more.
You can watch the whole episode above, don't forget to click CC to turn English captions on.
The shows concept of, wow look how little we eat, makes me so uncomfortable though.