Where do we exist questions three stages of contemporary human existence. Do we perceive our existence from a mirror？ Or from the digital world that takes over most of our time？ Or from our body in the physical world？ In my interactive installation, audiences are placed in the middle of a real mirror and a simulation of a mirror. By frequently shifting their perspectives between the two “mirrors”, audiences get to see themselves versus a virtual projection of themselves. Audiences can find themselves being detected when staring at the simulated mirror, and the imagery are getting pixelated and delayed when the audience is moving. When the audience stares at the real mirror, there is sound generated from the simulated mirror as a way to get the audience's attention. When the audience turns to the simulated mirror, the sound stops simultaneously.