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, one-piece swimsuit, horns, topless male, swimsuit, hairband, white hairband, day, blue sky, closed eyes, sweatdrop, blush, oni horns, outdoors, cloudy sky, ponytail, white one-piece swimsuit