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