darling in the franxx, zero two (darling in the franxx), hiro (darling in the franxx), o0str0o, signature, 1boy, 1girl, bangs, black hair, blue eyes, blue horns, breasts, couple, crying, crying with eyes open, eyebrows visible through hair, face-to-face, facing another, female, forehead-to-forehead, green eyes, holding hands, horns, interlocked fingers, long hair, looking at another, male, medium breasts, oni horns, pink hair, red horns, shirtless, short hair, tears, hetero