2girls, barefoot, bioluminescence, black hair, black skirt, city lights, cloud, facing away, galaxy, glowing, holding hands, long hair, looking back, mountainous horizon, multiple girls, night, ocean, outdoors, pleated skirt, pointing, pointing up, profile, rock, running, sailor collar, scenery, school uniform, serafuku, shirt, shore, short sleeves, skirt, sky, soles, splashing, star sky, starry sky, water, white serafuku, white shirt