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