akira hamaguchi, darling in the franxx, effects, liquid, 1girl, 1boy, hiro (darling in the franxx), zero two (darling in the franxx), pink hair, black hair, long hair, cloud, topless male, horns, sky, ponytail, day, water, swimsuit, partially submerged, outdoors, blue sky, tree, oni horns, red horns, nude, anime coloring, one-piece swimsuit, cloudy sky, breasts, completely nude