The three brothers discover that the human experiment banned after destroying the "Orochi", is still going on to secretly revive the evil snake. They also find out that some ex-members of the Yamainu (the Japanese military unit formed to kill the snake) are behind this conspiracy. The brothers fight together again in a battle against the military. (Source: Amazon Prime Video)

After a mysterious eathquake levels Tokyo, Genom becomes a powerful influence providing their artificial organic lifeforms called Boomers to rebuild and act as a labor class to humanity. However, some of them ocasionally run amok, and even the specially created AD Police are at a loss to stop them. Lina Yamazaki travels to Tokyo for employment but also hopes to join a vigilante force called the Knight Sabers, who pilot powered suits to destroy these rogue Boomers. (Source: ANN)

Hushed exchanges among the female student populace of Shinyo Academy center around an enigmatic supernatural entity. This entity is Boogiepop, a Shinigami who is rumored to murder people at the height of their beauty before their allure wanes. Few know of his true nature: a guardian who, between periods of dormancy, manifests as the alter ego of a high school girl named Touka Miyashita to fend off "the enemies of the world." Now, a string of mysterious disappearances—presumed by the school to be merely runaways—has caused Boogiepop to awaken. But somewhere in the academy, a menacing creature hides, waiting for its opportune moment to strike. Boogiepop wa Warawanai subtly explores the intrinsic associations between human beings and their perception of time, while delving into its characters' complex relationships, emotions, memories, and pasts. [Written by MAL Rewrite]

Unaired 13th episode of Boku wa Tomodachi ga Sukunai.