pixel art, 1girl, solo, long hair, looking at viewer, shirt, black hair, school uniform, upper body, monochrome, outdoors, serafuku, cloud, water, black eyes, floating hair, border, expressionless, ocean, beach, traditional media, wind, night sky, scenery, full moon, black sailor collar, spot color, no nose, dark, yellow neckerchief, no mouth, film grain, mountainous horizon, waves, muted color, shore, grey sky, moonlight, black sky