1girl, amazu_(kurozu), backless_swimsuit, bare_arms, bare_shoulders, black_one-piece_swimsuit, blue_background, breasts, from_side, hair_between_eyes, hands_on_own_hips, long_hair, medium_breasts, one-piece_swimsuit, original, ponytail, profile, red_eyes, red_hair, signature, solo, swimsuit, water, wet