1girl, arm_behind_head, arm_up, armpits, bare_shoulders, bikini, blue_sky, blush, breasts, cleavage, clothes_pull, cloud, collarbone, day, denim, denim_shorts, hair_tie, hair_undone, large_breasts, long_hair, looking_at_viewer, navel, o-ring, o-ring_bikini, open_fly, original, outdoors, pink_bikini, pink_eyes, pink_hair, presenting_armpit, red_hair, sawada_yuusuke, shorts, shorts_pull, sky, solo, standing, swimsuit