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