Scattered across the peaceful city of Kawado Higashi are "Guilt Seeds" that cause people's desires to run wild, turning them into dangerous monsters. What could the ordinarily quiet and inconspicuous Toka's reasons be for transforming in order to fight these creatures...?

Half a year after the lustfiend invasion initiated by the traitor Archbishop Rudolf—The Elleraldian throne is Cecily's, and to her too fall two heavy burdens: she must rebuild the nation into prosperity while fending off the ever-growing lustfiend threat...

The coiling chains of obsession that began with The Shell now threaten to strangle Detective Reiji Tokisaka in the third and final entry in the trilogy. As old friends and foes rise up for one last confrontation, can anyone break the cycle—and can Reiji's heart ever be set free?