Kimi to Boku no Saigo no Senjou, Aruiwa Sekai ga Hajimaru Seisen

Synopsis

During the battle with Salinger, Iska has Rin promise that if he defeats Salinger, she will not stop him and his friends until they cross the border. Meanwhile, at the palace, Schwartz reports the situation at Ollelugan to Sisbell Lou Nebulis IX. Back at Ollelugan, Rin aides Iska, while Alice is briefly confronted by Nameless. Alice then shows up at Iska and Rin's location, which allows Iska to turn the tables on Salinger. As such, Salinger decides to flee. The next morning, Rin reports to Alice that the prisoners have been accounted for and the Imperial soldiers have retreated. In the Empire, it is revealed that Risya was the one who actually confronted Alice as the real Nameless reports that the Central Province of the Sovereignty has been infiltrated. The 907th Unit meanwhile head home together. At the palace, Alice and Rin are having a conversation about Iska when it is revealed that Sisbell is spying on them. She soon realizes that Iska is the same Imperial soldier who rescued her.

(Source: Wikipedia)