After dealing with the demons of Shura's past, Shura, Rin and Yukio return to True Cross Academy. Yukio recovers from his wounds, Rin and his friends get back to their lives and the Illuminati continue to advance their plans. Lightning launches an investigation of the Illuminati, intending to get to the bottom of things. He and Suguro visit the archives deep below True Cross Academy, where they may uncover secrets that were buried there for a reason.

Reads from right to left. Translation of: Ao no ekusoshisuto. 18.