In order to fight loneliness effectively, the idea is to allow a personal and gradual discovery of the installation through a sensorial approach within the city. Through motion, video and sound sensors, mounted in the installation and across the city, the “flaneur” will be able to interact with another unknown user (“the familiar stranger”) through screens, lights or sound, thus allowing a more accessible approach to people who normally avoid social interactions. Social integration, can then be achieved in a more adapted way while leaving the option to the user to retract at any time, giving him a decision-making role in this interaction. The fact that he is in control of his involvement in that process can put him in a more confident state and ensure that the interaction is not forced. This playful setting, that could be dispatched in a more discreet way thought he city, revolves around a more immersive central element that recreates an interactive public space.