Biyondeumun is a cafe in an alley off Hoenamu-gil in Gyeongnidan-gil, Seoul, serving coffee and desserts. It serves strong coffee, einspänner, French toast, and cheesecake. The cafe occupies the first floor of an old detached house, with outdoor seating behind the building and on a terrace. There are few indoor tables, making it uncomfortable to stay for a long time.