1girl, aosaki_yukina, bare_shoulders, bikini, black_hair, breasts, choker, cleavage, collarbone, grin, hair_between_eyes, halterneck, high_ponytail, idolmaster, idolmaster_shiny_colors, large_breasts, long_hair, looking_at_viewer, navel, outdoors, ponytail, red_bikini, shirase_sakuya, side-tie_bikini_bottom, smile, solo, string_bikini, swimsuit, yellow_eyes