akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), pink hair, 1boy, black hair, long hair, horns, topless male, swimsuit, cloud, sky, closed eyes, ponytail, oni horns, day, water, one-piece swimsuit, hetero, couple, white hairband, blue sky, hairband, partially submerged, red horns, cloudy sky, bikini, alternate hairstyle, outdoors, anime coloring, male swimwear, ocean