The Life of Invoking: Ai - Seibutsu-tachi

As the Mars expedition comes to an end, a small group of Terraformars manage to reach Earth and bring the fight there. Now the surviving members of the ANNEX-I along with new recruits, have to save Earth from the growing roach menace.Note: The two OVA volumes bundled with the 21st and 22nd compiled volumes of the manga, respectively.