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