1girl, o, ahoge, ass, back, beach, bikini, bird, black_bikini, blonde_hair, blue_sky, bracelet, breasts, cloud, day, green_eyes, halterneck, haruki_(haruki678), hoshii_miki, idolmaster, idolmaster_million_live!, innertube, jewelry, large_breasts, looking_at_viewer, mountainous_horizon, ocean, outdoors, ponytail, ramune, shoulder_blades, side-tie_bikini_bottom, sideboob, sitting, sky, solo, string_bikini, swimsuit, wet, white_bird