The house is designed for a couple, the husband's father, and the wife's parents to live together. The design emphasizes a community core that protects the privacy of each household and at the same time provides a good sense of distance. The spatial configuration of the three families' living spaces, which are separated but connected, is expressed through the division of colors and materials and levels. In addition, to flexibly respond to future changes in family composition, we were conscious of time design and intended to make the multi-family house sustainable.