Create an anime-style illustration of a boy with short, slightly messy dark hair

Create an anime-style illustration of a boy with short, slightly messy dark hair. He should be wearing an oversized blue denim jacket. The boy's expression should be one of excitement, with wide eyes and his hands held up in front of him, palms facing out. The background should be a plain, light grayish-blue color to keep the focus on the character. Ensure the drawing has a clean, detailed, and slightly pastel color palette to match the aesthetic of modern anime illustrations.