A residential house with great balance of having private and shared space for rooms and keeping privacy from outside and having natural sunlight. It sounds like conflicting elements to have both, but this is an example of how design can create them. To keep privacy from outside, there are no windows but created a courtyard all around with windows on the 1st floor. Grating parts on the 2nd floor let the sunlight reaches the 1st floor. It reflects on the wall to make soft natural light. It also controls air-tightness and heat insulation to make the space comfortable and stress free.