Iseol Myeonok Suyu Main Branch sits near the 4.19 Tower in Suyu-dong, Seoul, and serves Hamhung naengmyeon, galbitang, and yeotnal bulgogi. Its mul naengmyeon comes with chilled broth and chewy noodles, while the seokki naengmyeon is served with meat and gajami hoe muchim. Warm onyuksu is brought out before the meal, and the large, clean dining space has parking and takeout meal kits. The restaurant is a two-story building run by a Korean food master.