akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), 1boy, pink hair, zero two (darling in the franxx), long hair, black hair, cloud, sky, horns, one-piece swimsuit, swimsuit, topless male, white hairband, day, hairband, blue sky, closed eyes, oni horns, sweatdrop, cloudy sky, outdoors, blush, looking at another