This work explores the "fear" born from a child's vivid imagination and psychological projection in the dead of night. The story follows a timid boy who, while walking back to his room alone, transforms subtle shadows and sounds into "unseen entities" through a chain of mental associations, staging a thrilling inner theater of self-induced terror. The design combines exaggerated reactions, rhythmic pacing, and layered sound effects to manifest the tension of accumulating fear. Although the mother’s arrival causes the illusions to vanish, a mysterious shadow emerging from under the bed at the end pulls the story back to the ambiguous boundary of fantasy. By evoking universal childhood memories, the work illustrates how imagination constructs fear, intertwining reality and hallucination in a perpetual cycle.