darling in the franxx, effects, naoya takahashi, smears, smoke, 1girl, 1boy, hiro (darling in the franxx), zero two (darling in the franxx), pink hair, long hair, black hair, horns, uniform, military uniform, military, pilot suit, oni horns, red horns, hetero, red bodysuit, looking at another, bodysuit, couple, necktie, bangs