Burger King Busan Yeonsan RFS is a Burger King branch near Yeonsan Rotary that sells Whoppers and hamburgers. Customers stop in for the Whopper, and the burgers taste like Burger King. The first floor is not part of the store; ordering and eating take place on the second floor, and the restroom is on the third floor. At lunchtime and on Sunday afternoons it gets crowded and there are not enough seats.