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, cloud, long hair, sky, topless male, horns, day, swimsuit, water, partially submerged, outdoors, ponytail, blue sky, tree, oni horns, anime coloring, cloudy sky, one-piece swimsuit, red horns, rock