From Hearts Coffee Lotte World Mall is a cafe in Songpa-gu, Seoul, selling coffee, croffles and mango bingsu. It sits at the inner edge of Lotte World with access out toward Lotte Mall. Freshly made croffles and coffee are the main items, and there are seats where you can sit looking out at the view outside. Chairs and tables face outward from the store, and the hall is on the small side.