akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), 1boy, long hair, pink hair, black hair, horns, green eyes, oni horns, anime coloring, bangs, couple, hairband, red horns, collarbone, white hairband, swimsuit, looking at another, hetero, one-piece swimsuit, open mouth, water, ponytail