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