akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), zero two (darling in the franxx), pink hair, 1boy, black hair, hetero, horns, looking at another, long hair, couple, swimsuit, sky, green eyes, anime coloring, face-to-face, blue eyes, bikini, cloud, blush, oni horns, day, blue sky, hug, bangs, open mouth, red horns