1girl, ahoge, ass, ball, barefoot, beach_umbrella, beachball, bikini, bikini_skirt, black_bikini, blue_sky, blunt_bangs, blush, brown_hair, collarbone, day, ear_blush, full-face_blush, haruki_(haruki678), hugging_own_legs, idolmaster, idolmaster_million_live!, knees_up, looking_at_viewer, outdoors, palm_tree, pool, poolside, sitting, sky, solo, suou_momoko, swimsuit, thighs, toes, tree, umbrella, water_drop