Shu's mother finally comes home, only to find her son living with a girl and an underwear-transporting robot. Elsewhere, a key strategic asset for Funeral Parlor is being targeted by a missile-happy American who's just joined GHQ.

Yahiro reappears with Jun, who's in Stage V Apocalypse disease and can no longer battle the cancer. With Gai out of town, Shu's left to make a command decision. But he AND the enemy are about to learn the virus doesn't work the way they think it does...

GHQ is awash in blood, chaos and song. As the Cancer sweeps over Tokyo, Shu faces the truth about friendship and the consequences of inaction.

Shu is conflicted about the Void ranking system, the student body is creaking under the tension, and vaccine stores are running low. At this rate, something--or someone--is going to snap.

Discontent within the ranks of the school is reaching fever pitch as the Exodus approaches.

Things have gone too far, and as a mother, it's up to Haruka to do something about it. But fortunately or unfortunately, no one in her life seems willing to let her--and she's not the only one who's made a decision.