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