school uniform, serafuku, 1girl, bubble, looking at viewer, black hair, short hair, blue neckerchief, blush, letterboxed, neckerchief, holding, short sleeves, bubble blowing, sunset, solo, cloud, outdoors, sky, sailor collar, from side, upper body, :t, black serafuku, bob cut, shirt, black sailor collar, black shirt, closed mouth, reflection, building, green eyes, looking to the side, soap bubbles, bicycle