1girl, arms_behind_head, black_one-piece_swimsuit, blue_archive, breasts, brown_hair, competition_swimsuit, cosplay, covered_navel, cowboy_shot, highleg, highleg_swimsuit, higuchi_madoka, horizon, idolmaster, idolmaster_shiny_colors, low_ponytail, medium_breasts, mole, mole_under_eye, multicolored_clothes, multicolored_swimsuit, ocean, one-piece_swimsuit, shiroko_(blue_archive), shiroko_(blue_archive)_(cosplay), shiroko_(swimsuit)_(blue_archive), short_hair, solo, swept_bangs, swimsuit, usagi_(786113654)