Guseul Coffee & Kim Donghun Coffee is a coffee shop in Namdaemun Market that serves hand-drip coffee and patbingsu and mango bingsu using a range of beans. A barista brews the coffee in front of you, and you can watch the coffee droplets roll like beads inside the cup. You can smell the coffee, choose your beans, and then order the drip you want, and there are several kinds of beans. The waffles come in a large portion, and the injeolmi patbingsu is soft like snowflakes.