Generate an anime-style illustration of a surprised boy with short

Generate an anime-style illustration of a surprised boy with short, messy hair. He has wide, expressive eyes and a small mouth open in astonishment. The boy is wearing a casual outfit consisting of a loose jacket over a simple top and shorts. He also carries a backpack. The background should be a solid, pastel pink color, and the overall style should be clean and detailed, with attention to the character's expressive features and the flow of his hair and clothing."