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