Hayunok is a Korean restaurant in Yongsan that serves Jinju-style naengmyeon, yukjeon, and galbi. The naengmyeon comes topped with yukjeon, and the bibim naengmyeon has a strong gochujang flavor. The mul naengmyeon sits between Pyongyang and Hamhung styles, and its broth is mild. The noodles sometimes clump together and need improvement.