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