Gildong Udon & Donkatsu Seongsu Branch is a snack shop near the well-known Seongsu gamjatang restaurant in Seongsu-dong, Seoul. It serves udon, noodles, gimbap, and donkatsu, including udon in an anchovy-based broth, tuna gimbap, and handmade king donkatsu. Orders are placed and paid for at a kiosk, and customers carry their own food, side dishes, and water to the table. When multiple menu items are ordered, the dishes do not come out all at once.