After the events of Mask of Deception, the Yamato Empire is now ruled with an iron fist by a ruthless usurper who seeks to subjugate all before him. It's up to a couple of familiar faces to band together against the might of the Imperial army, and the fate of the world hangs in the balance as nations and generals must pick a side to fight with in this perilous civil war. Secrets will be revealed, friendships will be tested, and battles will be fought. Will peace and order be restored or will victory at any cost be the beginning of the end?

After Akihito Kanbara reunites with Mirai Kuriyama—whom he believed had vanished after defeating Beyond the Boundary—he discovers a heartbreaking fact: Mirai has lost all memory of him, their friends, and her past as a Spirit Warrior. Akihito is utterly devastated, but realizes that she has a unique opportunity. Mirai can finally live the life of a normal girl—where she'll be completely devoid of the supernatural society that both shunned and used her. While it's all for the sake of Mirai's happiness, the price is costly—Akihito and his friends must keep her true origins a secret from her, and as a result avoid befriending her. However, the troubling memories of Mirai's old life gradually begin to resurface, and a mysterious new evil leads a group of shadow-like creatures into the city with the goal of seeking her out. As the situations become dire, Akihito must fight to protect himself, his closest friends, and Mirai—the bespectacled beauty he holds most dear. [Written by MAL Rewrite]

While spending the summer at his aunt's house, the young but sickly Shou makes an amazing discovery: after following the house cat into the bushes, he gets a glimpse of a miniature girl about the size of his finger! Calling her kind "Borrowers," as they survive on tiny bits of human possessions, the girl introduces herself as Arrietty. As he discovers that she lives in the house basement with her parents, Pod and Homily, Shou becomes imaginably excited at the idea of such unique neighbors.

However, he fails to understand the adversities they face on a daily basis. In addition to keeping their existence hidden, they must also embark on perilous adventures into human territory, from the house to the outdoors, in order to make a living. Despite her parents' warnings, Arrietty befriends Shou, stirring up unexpected events that may change their lives forever.

Delighting the eye and conquering the heart, the breath-taking story of a friendship transcending the tensions between two different human kinds begins.

After successfully holding off the invasion by Aftokrator, the Border Defense Agency prepares an away mission into the Neighbor's dimension. However, like in previous scouting expeditions, only A-rank teams are certain to secure a spot. As the B-rank wars continue, Osamu Mikumo and the rest of Tamakoma-2 quickly fight to the top in an attempt to obtain a promotion before the operation begins. Meanwhile, a new Neighbor ship approaches Border Headquarters. Noticing that the attackers are targeting the Border Expedition Ship, forces are hastily sent to combat them. However, with fewer squads available due to the proceeding rank wars, the organization is sent into disarray. This latest offensive from the Neighbors shrouds the fate of the all-important expedition ship in uncertainty.