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