Rule 34 Dev - 10s 1boy 1girl arm_cutout blush bodysuit brother_and_sister brown_hair closed_eyes crystal headgear jewelry mecha_pilot_suit necklace nishio_akira nishio_rina open_mouth pilot_suit short_hair siblings smile soukyuu_no_fafner spoilers synergetic_suit twins uc_(8rk3) unconscious|6596888103