When Soji is gravely wounded, Yoshimori's desire to protect his loved ones from harm leads to a startling transformation. But Yoshimori isn't the only one with an interest in Soji's survival. What role does the mysterious boy play in the ambitions of a powerful foe...?

Then, tragedy strikes Karasumori...

In the aftermath, restructuring at the Shadow Organization—the group charged with protecting humanity from dark magic—leads to a promotion for Yoshimori's elder brother. And then the boys' absentee mother turns up with a surprising agenda for both Yoshimori and the guardian of Karasumori!