akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), 1boy, pink hair, zero two (darling in the franxx), swimsuit, long hair, topless male, black hair, horns, cloud, one-piece swimsuit, sky, ponytail, closed eyes, anime coloring, water, day, hetero, blue sky, outdoors, partially submerged