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, cloud, sky, swimsuit, horns, ponytail, day, water, one-piece swimsuit, partially submerged, outdoors, blue sky, oni horns, red horns, tree, cloudy sky, rock, white one-piece swimsuit, looking at another