Cheongchosu Mulhoe & Seopguk Songpa is a Sokcho-style seafood restaurant in Songpa-gu, Seoul, serving haejeon mulhoe, sea urchin bibimbap, and ojingeo sundae. The mulhoe broth is tangy, spicy, and cold, and you can add somyeon noodles or rice to it. Last orders are at 8:30 p.m., and takeout is available. Expect a wait in the evening.