SuBaCo project is a residential development project that aims to create and maintain a better living environment by coexisting not only with people but also with surrounding creatures such as birds and butterflies that live in the area. This is the era when we shift from manufacturing for people to sustainable development that take the environment into consideration. Designing coexistence with surrounding creatures even within a limited site will not only protect a small ecosystem, but will also spread to the lives of residents and the surrounding townscape, leading to a better future.