1girl, arms at sides, backlighting, black eyes, black hair, black sailor collar, circle, expressionless, floating hair, half-closed eyes, head tilt, limited palette, long hair, looking at viewer, mole, mole under eye, no pupils, open mouth, pale skin, portrait, red background, sailor collar, school uniform, serafuku, solo, straight-on, tongue, tongue out, tongue tattoo, twitter username, watermark