Co-living is a new, synergistic form of housing with private and common areas based on shared economy. Bathroom under this condition transforms from a personal space to a public and shared space. Users are sacrificing themselves to adapt to new environment, which leads them expecting bathroom experiences personalized just for them. Users in this society mostly live in rentals where renovations are not allowed. So the goal of this project is to help users under co-living context customize their bathroom experience and enhance the emotional value of bathroom with minimum hardware installation.