The heroic sacrifice of the civilian crew allows No.1 and No. 2 division to temporarily take back control of the communications tower. But the last member of the crew passes out before she can tell Earth about No. 4 division's betrayal. Is all hope lost, or is there another way?

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.