Symbiosis is a housing project conceived as a support system for two vulnerable populations: single parents and the elderly. Through intergenerational living, both communities can experience a mutualistic relationship to address their needs. Time is the key exchange for confronting the different kinds of loneliness, and children become the activators. This interchange is materialized from the outside to the inside through a connecting band of shared living spaces, previously known as the corridor. The interaction between the elderly and the younger generation starts redefining “boundaries” as a mutual intention to create a safe space for the other to thrive. Symbiosis is complete when the corridor is blurred and the different apartment units become one space.