Heehee Double Happiness is a fusion Chinese restaurant on the pop-up store street in Seongsu, Seoul, serving Hong Kong-style dishes and American Chinese menus. The menu includes chaomian, mapo tofu, har gow, and malaxiangguo, with malaxiangguo available in a small size. Reservations can be made through the CatchTable app, walk-ins are accepted, and there are separate restrooms for men and women. The food is seasoned heavily, making it closer to drinking food than a meal.