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