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