Jeongseongok Seongsu Branch is a Korean restaurant in Seongsu, Seoul, serving jjamppong sundubu, gukbap, and memil makguksu. The jjamppong sundubu gukbap has a spicy, fiery flavor with a smoky char, and contains sundubu and seafood pieces. Rice and side dishes are self-serve and unlimited, and an electric vehicle charging station is on site. The gukbap dishes are salty and spicy, making them difficult for children to eat.