Radiant Vol. 6 (manga)

As spectrum Nemeses start to appear all over Cyfandir, Seth is drawn into a nefarious plot against his will. Suspicion stalks the very halls of the Wizard Knights' castle, and the Merchant Barons watch with pleasure as these supernatural events unfold. And it's only a matter of time before Captain Dragunov and Captain Liselotte get their hands on Seth!