Kumo desu ga, Nani ka?

Synopsis

Julius visits the Academy to tell Shun and Sue the Demons are mobilizing for war and he is being sent to the front lines. Meanwhile, it is revealed that the Nameless that dragon killed was an illusion. With help from all four of her minds, she then successfully cast <Abyss Magic> to kill the dragon. However, she is then confronted by a mysterious man with administrative privileges who sensed the dragon's death. As they fail to communicate due to a language barrier, a smartphone suddenly appears out of nowhere. The caller then converses with the mysterious man, who leaves, before addressing Nameless and introducing herself as D. Realizing she has been watching her, Nameless asks what D wants to which she answers it is just entertainment and ends the call before Nameless could ask further. In the Demon Realm, the Demon Lord holds council with her generals and declares war on humanity. Back at the academy, Shun suddenly unlocks the <Hero> title, which can only mean one thing: Julius has been killed!

Note: It is revealed in this episode that Nameless's storyline takes place fifteen years before that of the other classmates.

(Source: Wikipedia)