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