akira hamaguchi, darling in the franxx, effects, liquid, 1girl, 1boy, hiro (darling in the franxx), pink hair, zero two (darling in the franxx), black hair, long hair, cloud, sky, one-piece swimsuit, white hairband, horns, topless male, green eyes, swimsuit, hairband, day, blue sky, looking at another, cloudy sky, oni horns, outdoors, blue eyes, white one-piece swimsuit