Burger King Ssangmun is a fast-food restaurant in Ssangmun-dong, Seoul, selling burgers, french fries, and hot chocolate. Customers can choose from the Whopper, Long Chicken Burger, and Tong Mojja Whopper, ordering at kiosks or through an app. The seating area is large, order numbers are called out loudly, and food comes out quickly. Patties sometimes arrive cold or undercooked.