Billie Angel Coex Mall is a dessert cafe specializing in cakes, located on the second floor of Starfield Library in Coex Mall, Samseong-dong, Seoul. It serves carrot cake, milk crepe, chocolate cake, macarons, and jasmine milk tea. Take the escalator up from Starfield Library to reach it, and the outdoor seats facing the library let you drink while looking at the bookshelves. Desserts can only be eaten inside the cafe.