Sonyounghwan Bibim Guksu Main Branch is a noodle shop in Busan that serves bibim guksu, mul guksu, and janchi guksu. The bibim guksu mixes chewy noodles with a spicy gochugaru-based sauce that is not strongly sweet or sour, and it comes out somewhat like a watery bibim. The mul guksu is served in a rich katsuobushi broth and can be ordered with mul mandu, and at lunch the shop is crowded with customers from nearby legal institutions while parking is convenient. After eating the bibim guksu, a slight spiciness lingers.