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