akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), 1boy, pink hair, black hair, topless male, long hair, cloud, horns, sky, one-piece swimsuit, swimsuit, hetero, looking at another, day, couple, ponytail, water, blue eyes, partially submerged, oni horns, cloudy sky, blue sky, anime coloring, red horns, face-to-face, outdoors