akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), 1boy, pink hair, horns, long hair, black hair, topless male, swimsuit, cloud, sky, closed eyes, day, hetero, ponytail, water, couple, partially submerged, oni horns, anime coloring, blue sky, bikini, outdoors, red horns, hairband, cloudy sky, white hairband, smile