Coffee Nap Roasters Seongsu is a three-story cafe at the end of an alley in a residential area of Seongsu, Seoul, serving coffee and baked goods. Beans can be selected, and an acidic latte is served alongside egg tarts and canelés. Seating continues from the basement to the upper floors, so guests can stay on multiple levels. There is no large sign, which makes it hard to find at first.