Our imagination about the world is based on subjective consciousness of how we see reality. This is true of XR as well. Just like a beam of light thrown onto objects, adding a projection of "imagination" onto actual space. The theme of Sandbox Immersive Festival 2019 is Immersive City, and it's all about immersing into virtual reality, rediscovering the earth with new eyes, and reviewing familiar spaces from another perspective. Therefore we came up with the concept "Plug-ins", casting a beam of yellow light onto an office environment. As the light changing forms while switching spaces, the common space is shown in a very unexpected way.