Episode 12.5 of Osomatsu-san 4th Season.

In the Forbidden City, which has a long history and profound cultural heritage, there live many cute cats. From the perspective of humans, they live an enviable and leisurely life. Among them, six royal cats are special. They are responsible for protecting the memory of cultural relics of "Wuhua." They entered the world of Wuhua and defeated the destroyer Black Owl time and time again, bringing the world of Wuhua back on the right track and thus protecting the cultural relics. The six imperial cats are Luban and Momo from the literary class, and Shuangmei, Aobai, Pingan and Xiaozai from the martial class. Not only are they intelligent and brave, they also have a tacit understanding. They form the Forbidden City Imperial Cat Room, which protects the national treasures of the world.

After a brutal surprise attack by the forces of Quincy King Yhwach, the resident Reapers of the Soul Society lick their wounds and mourn their losses. Many of the surviving Soul Reaper captains train to battle without their Bankai, the ultimate technique wielded by the fiercest warriors. In the previous assault, Ichigo Kurosaki narrowly managed to help fend off Yhwach's fearsome wrath. However, to ultimately defeat his godly adversary and save his allies, Ichigo must now undergo severe training that will push him beyond his physical, emotional, and mental limits. Though Yhwach already holds the upper hand in this ongoing blood feud, he also successfully recruits Uryuu Ishida, Ichigo's close friend and rival, to be his successor. Yhwach strikes out once again at the weakened Soul Society, intent on finally obliterating his long-standing enemies. As Ichigo struggles to attain new power, the Soul Reaper captains fight for survival and borrowed time.

Theatrical compilation of .