1girl, artist_name, ass, backless_swimsuit, beach, black_hair, blue_one-piece_swimsuit, blue_sky, breasts, brown_eyes, cloud, cloudy_sky, competition_swimsuit, day, from_behind, full_body, girls_und_panzer, hairband, half-closed_eyes, hand_in_own_hair, heart, heart_print, holding, holding_innertube, horizon, innertube, kneeling, long_hair, looking_at_viewer, looking_back, nabeyu, ocean, one-piece_swimsuit, outdoors, parted_lips, reizei_mako, sandals, signature, sky, small_breasts, solo, swimsuit, wet, white_hairband, yellow_footwear