kitano yukito, mashiro yu, gakuen idolmaster, idolmaster, commentary request, highres, 1girl, bikini, bikini skirt, black hair, blue hair, blue neckerchief, blue sailor collar, blush, brown eyes, closed mouth, collarbone, cowboy shot, grey jacket, jacket, jacket on shoulders, looking at viewer, navel, neckerchief, sailor bikini, sailor collar, sailor swimsuit (idolmaster), simple background, solo, swimsuit, white background, white bikini