Ssangdungi Kalguksu is a small restaurant in an alley in Unchon-dong serving kalguksu (knife-cut noodles), gimbap, and buchimgae. Its menu includes eolkeuni-jang kalguksu, deulkkae kalguksu, and yeolmu noodles, with kimchi made in-house. The owner runs the restaurant alone, and customers can choose regular or large portions. Young customers often order spicy kalguksu and tteokbokki, and the small restaurant is kept clean.