akira hamaguchi, darling in the franxx, effects, liquid, 1girl, hiro (darling in the franxx), pink hair, 1boy, zero two (darling in the franxx), black hair, long hair, horns, hetero, looking at another, swimsuit, green eyes, sky, face-to-face, couple, anime coloring, blush, cloud, blue eyes, ponytail, oni horns, day, blue sky, one-piece swimsuit, hug, hairband, eye contact, sweatdrop