masterpiece, 1girl, solo, c-aya, blonde hair, long hair, pink eyes, long hair, sailor collar, serafuku, short sleeves, red neckerchief, pleated skirt, looking at viewer, outdoors, day, legs, blush, light rays, back lighting, sky, head tilt, arms behind back, smile, back, from behind,

worst quality, old, low quality, lowres, signature, username, blurry, sketch, 3d, blur, outline,