Wangseong Sikdang is a Korean restaurant in the Galchi Golmok alley of Namdaemun Market in Seoul that serves hairtail braised in soy sauce. Ordering the braised hairtail also brings grilled hairtail and steamed egg. The first floor holds only four tables, so the second-floor attic opens when the wait runs past 1:30 p.m. The ceiling on the second floor is low.