Cheongaok is a naengmyeon (cold noodles) restaurant in the food alley of Cheonho-dong Rodeo Street. It serves thin, springy Hamheung-style naengmyeon noodles with a spicy and sour sauce and the flavor of sesame oil. Warm broth is served in a kettle as soon as you sit down, and ordered dishes arrive quickly. The interior is small, so seating is limited.