Ushio Aotsuki is a stubborn middle school student and son of an eccentric temple priest who goes about life without care for his father's claims regarding otherworldly monsters known as youkai. However, as he is tending to the temple while his father is away on work, his chores lead him to a shocking discovery: in the basement he finds a menacing youkai impaled by the fabled Beast Spear. The beast in question is Tora, infamous for his destructive power, who tries to coerce Ushio into releasing him from his five hundred year seal. Ushio puts no trust in his words and refuses to set him free. But when a sudden youkai outbreak puts his friends and home in danger, he is left with no choice but to rely on Tora, his only insurance being the ancient spear if he gets out of hand. Ushio and Tora's meeting is only the beginning of the unlikely duo's journey into the depths of the spiritual realm. With the legendary Beast Spear in his hands, Ushio will find out just how real and threatening the world of the supernatural can be. [Written by MAL Rewrite]

Unaired episode included with the 7th volume of the BD/DVD release of Kobayashi-san Chi no Maid Dragon.

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]