akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), 1boy, zero two (darling in the franxx), pink hair, black hair, long hair, sky, cloud, closed eyes, white hairband, horns, one-piece swimsuit, topless male, hairband, day, green eyes, blue sky, swimsuit, cloudy sky, oni horns, hetero, couple, looking at another, outdoors, anime coloring, bangs, white dress, open mouth