Retro Children's Book Illustration: Teenager and Cosmic Monster AI Image Prompt

Retro children's book illustration style fantasy magazine cover. A teenager wearing red round sunglasses stands in a pastel forest, dressed in a yellow-green polka dot long coat, black red-dot pants, and red shoes. Behind him stands a giant white fluffy cosmic monster. The monster's body is soft and fluffy, with long arms reaching the ground. Its face is like a red oval mask with multiple blue-green circular eyes and a ring of small teeth, expression innocent yet bizarre. Background: light pink sky, orange-red abstract tree trunks, dark green tree silhouettes, light green grass, small mushrooms, and strange plants. Overall: flat hand-drawn lines, children's picture book texture, slight paper grain, soft pastel colors, whimsical cute, innocent fantasy, cosmic dreamer theme, AIGC art magazine cover layout, upper left has bold black title text area, lower right has small logo and short text layout, high-end design sense, complete composition, retro print feel, 2D illustration, no real photography, no 3D rendering.