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