HWA HUN is a minimalist house located in Seoul, South Korea designed by IROJE KHM Architects. This site is located in the heart of Seoul, near urban mountain “Bukhansan” mountain. The shape of site which is irregular polyhedron has been the shape of this house to maximize the land use. The architects added the topographic architecture on the existing topography of site which is steep sloped to harmonize with natural condition of site.