Bonjirereu Seongsu is a cafe at the end of an alley in Seongsu that serves coffee and dessert. It offers lattes, decaf coffee, and desserts such as Bonjirereu muffins and lemon cake, and drinks are brought to your seat. The cafe uses a basement level and two floors above ground, with different interiors on each floor and large tables and various seats. With few seats, weekends often bring a full house, a wait, and competition for seats.