1girl, alternate costume, bag, cellphone, crystal, fingernails, greyscale, hair ribbon, holding, holding phone, looking at viewer, medium hair, monochrome, neckerchief, one side up, phone, pleated skirt, ribbon, sailor collar, sailor shirt, school uniform, serafuku, shirt, short sleeves, shoulder bag, simple background, skirt, slit pupils, smartphone, solo, upper body, white background, wings