A Japanese fantasy artwork inspired by the cat yokai, rendered in the textured spirit of sumi-e (traditional East Asian ink painting). In an old moonlit tatami room, a small black cat and a large shadow-cat bleeding across the shoji (paper sliding door) quietly stand watch over the unease of a sleepless night. No human figure is shown directly — only a rumpled futon and the empty space beside a pillow hint at the presence of someone who could not find sleep. ※ The gold areas are not metallic foil or gold leaf; the color is achieved through giclee printing. ※ Colors and brightness may appear slightly different depending on your screen settings and lighting conditions. ※ This is an AI-assisted artwork. Artist Yoakari directed the original concept, composition, color design, and final visual curation using AI generative technology.