akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), pink hair, 1boy, black hair, long hair, horns, swimsuit, cloud, topless male, sky, hetero, oni horns, day, ponytail, couple, one-piece swimsuit, water, red horns, white hairband, hairband, blue sky, hand on another's arm, looking at another, bikini, cloudy sky, partially submerged, outdoors, sweatdrop, anime coloring, alternate hairstyle