1girl, armpits, ass_visible_through_thighs, bad_pixiv_id, blue_sky, breasts, brown_hair, chain-link_fence, cloud, competition_swimsuit, covered_navel, day, double_bun, fence, hair_bun, hibika, idolmaster, idolmaster_cinderella_girls, munakata_atsumi, one-piece_swimsuit, outdoors, pool, red_eyes, short_hair, sky, small_breasts, solo, stretching, swimsuit, two-tone_swimsuit, white_one-piece_swimsuit