1girl, armpit_crease, asakura_nuruma, bad_twitter_id, beach, bikini, black_hair, blue_eyes, blush, breasts, cleavage, close-up, footprints, long_hair, looking_at_viewer, medium_breasts, midriff, navel, outdoors, sakurajima_mai, sand, seishun_buta_yarou, smile, swimsuit, walking, water, white_bikini