This counter-order spot is the only place you’ll find sundae guk, a soup with house-made blood sausage (stuffed with pork blood and glass noodles) flanked by slivers of tripe and tongue, its surface thick with sliced scallions and jalapeños sprinkled with nutty perilla seeds that lend depth of flavor. If you’re in the mood for spice, the pork neck soup is hearty with potato, bean sprouts, and neck bones bearing flavorful meat. Regulars know to snag a sleeve of kimbap, Korean vegetable sushi, on the way out.