1girl, ahoge, bad_pixiv_id, ball, beach, beachball, black_eyes, black_hair, blue_one-piece_swimsuit, blue_sky, cloud, cloudy_sky, cowboy_shot, day, dutch_angle, girls_und_panzer, holding, holding_ball, horizon, isuzu_hana, lens_flare, long_hair, looking_at_viewer, medium_hair, ocean, one-piece_swimsuit, ooarai_(ibaraki), open_mouth, outdoors, school_swimsuit, sky, smile, solo, standing, sunlight, swimsuit, torii, twitter_username, water_drop, wet, yurikuta_tsukumi