yureru 300, himesaki rinami, gakuen idolmaster, idolmaster, commentary request, highres, 1girl, black one-piece swimsuit, blue eyes, blush, breasts, brown hair, collarbone, covered navel, cowboy shot, hair bun, hands up, holding, holding towel, looking at viewer, medium breasts, medium hair, one-piece swimsuit, open mouth, sideboob, simple background, single hair bun, smile, solo, standing, swimsuit, thighs, towel, towel around neck, wet, wet hair, white background