high-quality, vivid colors, soft shading, exaggerated expressions, playful atmosphere, large sparkling anime eyes, 2D anime art style, Hatsune Miku in a Japanese high school uniform (JK style), split personality design: left side honor student, neat uniform, tidy hair, polite smile, holding a textbook, standing in a clean bright classroom; right side delinquent (yankee), loose tie, short skirt, rebellious accessories, mischievous grin, graffiti and neon lights behind her, dramatic contrast between the two sides, seamless split down the middle