8k, masterpiece, delicate illustration, flat color, beautiful eyes, depth of field, clean and beautiful classroom background, best lighting, detailed illustration, very delicate rendering, surreal, natural and not excessive glamour, chest-length long hair, beautiful sky blue hair color, inner hair is a darker blue, voluminous and clean hair, natural bangs reaching the eyes, natural expression and composition, beautiful ice blue eyes, excellent clothing detail, school uniform, ribbon bow, mature and calm atmosphere.
