Yorino has learned the horrifying truth behind the kaiju--that every time she kills one, a human in her world dies. Instead of letting this discourage her, she's vowed to end the otherworldly threat once and for all, so that Haruka's death will mean something. Together with Youko, she will shoulder the Bulwarks' secret sin. But even as Yorino's new friendships begin to deepen, her battles with the kaiju grow more intense!