1girl, arms_behind_back, beach_umbrella, bikini, bikini_top_only, blue_shorts, blue_sky, blush, breasts, closed_eyes, cloud, collarbone, cowboy_shot, day, denim, denim_shorts, dot_nose, emu_(emum), flower_ornament, hand_on_own_forehead, hand_up, idolmaster, idolmaster_million_live!, innertube, kitakami_reika, long_hair, medium_breasts, navel, open_mouth, outdoors, palms, shorts, sky, smile, solo, sparkle, stomach, swimsuit, thighs, twintails, umbrella, water_drop, watermelon_innertube, wet, white_bikini