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