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, swimsuit, sky, cloud, topless male, ponytail, water, closed eyes, day, one-piece swimsuit, hetero, oni horns, blue sky, hairband, partially submerged, couple, outdoors, anime coloring, open mouth, cloudy sky