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, horns, topless male, black hair, swimsuit, cloud, sky, ponytail, closed eyes, oni horns, day, bikini, hetero, water, couple, blue sky, red horns, partially submerged, outdoors, male swimwear, alternate hairstyle, cloudy sky, open mouth