Playful flat vector human-pet poster illustration

Playful flat vector poster illustration depicting [character] and [animal] posing in [scene] in [pose], wearing [outfit]. Use clean thick black outlines, simple rounded geometric shapes, flat solid color fills, minimal facial details, tiny neutral eyes, calm expressionless faces, simplified hands and body proportions, soft color block patchwork, sparse confetti doodles, tiny abstract icons, clean negative space, crisp graphic poster layout, and controlled [color tone]. Vertical 4:5 composition.