A house is located in north of Hamamatsu city in Japan, and it is surrounded by mandarin plantation on mountain which is feature of the area. Its interior space are equally divided into two different sections, Indoor and semi-outdoor space, to get the sense of relationship between nature and inhabitation that has been lost in modernism. Large part of the indoor space is allocated to living room to enrich communication between the family, whilst the other rooms are minimized.The other half, semi-outdoor space covered with pergola, has been installed to extend living realm to outside of the indoor space. It works as buffer zone between nature and habitation. Simultaneously, it is extension of living room and entrance doma: a traditional entrance space covered with earth floor that usually comes with various functions such as kitchen or workspace. In this space, expanded activities from indoor space allows residents to feel sense of local environment in its surroundings whilst they keep their activities as the one in indoor space. The pergola is consisted with complex stripe pattern which gives poetic silhouette changed by angle of sunlight to give users sense of time. In terms of materiality, scraped mortar with crashed white rock as a local material are applied to the wall. The wall continues from outside to the inside with same material to connect both sections. Additionally, both side of the walls have finished by different scraping equipments to soften indoor space.