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