background animation, darling in the franxx, hair, kazutaka sugiyama, hiro (darling in the franxx), 1girl, zero two (darling in the franxx), 1boy, pink hair, long hair, black hair, bodysuit, horns, pilot suit, uniform, military, military uniform, holding hands, oni horns, hetero, couple, red bodysuit, red horns, window, looking at another, bangs, white hairband, closed eyes, shoes