CoffeeBuy Roasters is a coffee shop on the second floor near Jamsil Saenae Station Exit 3 in Songpa-gu, Seoul. It serves steam lattes, bongbong lattes, dalgona lattes, and hand drip coffee, and a roaster is inside the store. Seating is spacious and quiet, an extra shot can be requested at no charge, and a cheesecake that takes 25 minutes is available. The stairs up to the second floor are steep and dangerous.