Crushed by her failure to save her best friend, Izumo lashes out at Suguro! Their bickering escalates until the whole class is involved, and they're all sent to detention. Suddenly, the students are attacked by the ghoul Rin fought the day before!

After the excitement of being promoted to ExWire, Rin is soon disgusted with his load of homework. Then, Yukio is summoned for an urgent mission! The familiar of the Knights of the True Cross has gone berserk, and Yukio has to deal with the crisis.