high quality, best quality, anime screencap, anime coloring, s3n, 1girl, solo, long hair, brown hair, hair between eyes, x hair ornament, purple eyes, large breasts, serafuku, school uniform, sailor collar, long sleeves, pleated skirt, zettai ryouiki, black thighhighs, 3/4 view, sitting at desk, focused thoughtful expression, classroom background, desks and chairs, afternoon sunlight, detailed environment