akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), 1boy, pink hair, topless male, black hair, swimsuit, long hair, cloud, horns, sky, ponytail, one-piece swimsuit, day, water, anime coloring, hetero, blue sky, looking at another, partially submerged, outdoors, cloudy sky, oni horns, couple, alternate hairstyle, smile