Tantanmyeon Gongbang The Black One Grove Branch is a tantanmyeon restaurant in Magok, Seoul, selling tantanmyeon and chashu don. Its Special Tantanmyeon and Gopchang Tantanmyeon use a tonkotsu-based special broth, and noodles can be selected. Ordering is done on a smartphone without a menu, and it is the only premium store in the country marking the brand's 10th anniversary. Seating is limited, so waits can run long.