Sunny Nook is a restaurant in the basement behind Seongsu Station serving American-style brunch and pasta. The daepa cream gnocchi is seared crisp on the outside, the crispy chicken cream pasta comes topped with fried chicken, and the fries are served with truffle mayo. The open-kitchen space has vintage interiors and large tables, and reservations can be made through CatchTable. The basement setting carries retro decor and music reminiscent of an American local diner.