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