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