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