Hero Syndrome, Vol. 3 (light novel) — Rei Ayatsuki

A week has passed since Kaguya lost consciousness. She’s now comatose, trapped within the mind of a hero; her condition continues to decline, compounded by news of the Director’s death. It isn’t long before another hero appears, sparking a new battle for Charon. But Kaguya taught them that heroes can be saved, something that is not so easy to forget. There are many kinds of heroes, and not everything is as it seems with the Extermination Bureau. Where did the heroes come from, and why must Charon keep fighting?