1boy 1girl barefoot black_hair blue_eyes blush commentary_request couple darling_in_the_franxx finger_in_another's_navel green_eyes hetero hiro_(darling_in_the_franxx) horns lipstick long_hair makeup military military_uniform no_legwear oni_horns open_clothes pink_hair red_horns sakuragouti sitting sitting_on_lap sitting_on_person socks uniform zero_two_(darling_in_the_franxx)