1girl, aketa_mikoto, beach, bikini, black_bikini, blue_sky, blush, breasts, brown_eyes, brown_hair, cleavage, closed_mouth, cloud, cowboy_shot, day, grabbing_own_arm, idolmaster, idolmaster_shiny_colors, looking_at_viewer, medium_breasts, mountainous_horizon, ocean, outdoors, side-tie_bikini_bottom, sky, solo, standing, swimsuit, thighs, yuro_(7_yuro)