1girl, armpits, arms_behind_head, arms_up, barefoot, blue_eyes, blue_sky, breasts, brown_eyes, chain-link_fence, cleavage, cloud, day, fence, highleg, highleg_swimsuit, houin_kyouko, kodomo_no_jikan, large_breasts, looking_at_viewer, outdoors, qkat_(arikawa-dou), short_hair, sitting, sky, solo, spread_legs, starting_block, swimsuit, water, whistle, whistle_around_neck