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