This is a renovation of an architect's own residence. The floor on the second floor of the apartment building in a high-density residential area was planned as a base for the diverse activities of the architect: a residence, a work space, a studio, and a showroom. While creating a multi-use space, we attempted to thoroughly eliminate the "residentialness" of the interior. The one-room, loaded with existing and maximized, will become a vessel for diverse activities overlapping work and private life, and will change its shape as the couple's life stage changes in the future.