1girl, adjusting_eyewear, bikini, black_bikini, blue_sky, blurry, blurry_foreground, breasts, brown_hair, collarbone, front-tie_bikini_top, front-tie_top, hand_on_eyewear, idolmaster, idolmaster_cinderella_girls, ka_(reonkat), kamijo_haruna, looking_at_viewer, micro_bikini, navel, red-framed_eyewear, side-tie_bikini_bottom, sky, small_breasts, smile, solo, splashing, string_bikini, sun, sunlight, swimsuit, water_drop