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, sky, cloud, white hairband, horns, one-piece swimsuit, green eyes, topless male, hairband, day, blue sky, looking at another, swimsuit, oni horns, cloudy sky, sweatdrop, blue eyes, red horns, hetero, couple, bangs, outdoors, blush