Biat Seongsu is a large cafe an eight-minute walk from Seongsu Station, serving desserts such as ube injeolmi croffle and tiramisu balls. Its signature items are the ube injeolmi croffle, which combines ube cream, injeolmi, and a crisp croffle, along with peach latte and Earl Grey Assam milk tea. The seating is split into two sides, with sofa seats and a photo zone. The cafe sits a short distance from the Seongsu Station cafe street and away from the main Seongsu commercial area.