Song is an udon restaurant on the 10th-floor dining area of Hyundai Department Store Trade Center in Samseong-dong, Seoul. It serves dolsot udon and memil guksu, and orders can include jaengban memil guksu, pan momil, mandu, twigim and donkkaseu. The restaurant has operated in the same spot for over 20 years, and a long line forms at lunch. Waiting times during meal hours are long.