Utsuroi depicts the life of a raindrop through a gradient of light.  Falling, touching, spreading, and disappearing—the process is traced not through matter but through light. The shift from blue to orange marks the passage of time. Clear form and delicate optical change overlap, dissolving the boundary between object and event.  Under the concept of “light as afterglow,” the work constructs a spatial relationship between light and memory. Here, transience becomes the subject itself, allowing dissipating moments to remain within the space.