Key visual composition for a new image story, the isekai "World of Rain" in Wakoku managed by a black cat. Quiet blue hour rain scenery where one can almost smell the rain, damp cobblestones, thin mist, rain-soaked alleys, transparent puddles, droplets falling from an umbrella, and a silence where the sound of rain seems audible. Slightly off-center, a cute girl stands in the rain holding an umbrella. She has a slightly tired, melancholic expression, creating an atmosphere of being fed up with the rain, saying "Rain again," yet there is a soft, slight smile on her lips, an expression where a small happiness exists within the melancholy. Only the inside of the umbrella has a faint, warm light, contrasting the cold blue of the rain with the small sense of happiness inside. Cute yet slightly poignant, bright yet slightly lonely, a sense of quiet contradiction. In the puddle, the scenery of the isekai is reflected, where the real rain scenery and the streets of isekai Wakoku overlap in a double exposure expression. In the reflection of the water's surface alone, another world exists, a fantastic structure where the boundary between the rain world and the isekai becomes blurred. Deep in the reflection of the puddle is the small figure of a black cat, quietly watching like the "manager of the world," but not the protagonist, just a small existence indicating the story. Bubble pop, pop art, flat pop, rounded raindrops, organized graphic shapes, a fusion of cute design and fantastic emotion. Blue hour, deep blue, blue-grey, pale light blue, small amount of white, with only one point of modest warm light, transparent raindrops, and soft reflected light. A composition with large negative space, where the space itself expresses the silence of the rain, not filled with decorations. An S-curve visual guidance where the gaze flows naturally from the girl to the umbrella, water droplets, puddles, and the isekai reflection, without concentrating too much information in one spot. A quiet key visual, a composition that lets the story be felt in a single image. Cinematic anime illustration, high quality detailed illustration, beautiful atmospheric perspective, soft rainy atmosphere, subtle double exposure, dreamlike isekai boundary, cute but melancholic, minimal visual storytelling, strong negative space, poetic aftertaste. No text, no logos, no advertisements, no text on signs, no excessive decoration, no excessive sparkles, avoiding information overload in the background, no multiple characters. Anime illustration, great quality, best quality.