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