1girl, arm_up, barefoot, beach, bikini, blue_sky, breasts, cleavage, closed_eyes, collarbone, eyelashes, head_tilt, idolmaster, idolmaster_cinderella_girls, multicolored_hair, navel, okazaki_yasuha, on_ground, open_mouth, outdoors, red_bikini, sand, shaddoll_fusion, shadow, short_hair, sitting, skinny, sky, small_breasts, smile, sweat, swimsuit, thong_bikini, water