In 2015, the Chaldea Security Organization draws on experts of both the magical and mundane fields to observe the future of mankind for possible extinction events. Humanity's survival seems assured for the next century—until the verdict suddenly changes, and now eradication of the species awaits at the end of 2016. The cause is unknown, but appears to be linked with the Japanese town of Fuyuki and the events of 2004 during the Fifth Holy Grail War. In response, Chaldea harnesses an experimental means of time travel, the Rayshift technology. With it, Ritsuka Fujimaru, a young man newly recruited to the organization, and the mysterious girl Mash Kyrielight, can travel back to 2004 and discover how to save humanity. A grand order to fight fate has been declared—an order to change the past and restore the future.

One day after school, Asahi Kuromine stumbles upon the truth that Youko Shiragami, the girl he has a crush on, is actually a vampire. According to her father's rules, Youko must now quit school in order to keep her family safe. However, Asahi does not want her to go and promises that he will keep her true nature secret. Unfortunately, this turns out to be easier said than done, as Asahi is a man who is easy to read and is unable to keep any secrets to himself. And this is only the beginning of his troubles—more supernatural beings enter his life, and he is forced to protect all of their identities or face the consequences. Jitsu wa Watashi wa follows Asahi as he deals with his new friends and the unique challenges they bring, struggles to keep his mouth shut, and desperately tries to win Youko's heart in the process.

A short OVA that was bundled with the limited edition of the eleventh volume of the manga.

Vanitas and Noé Archiviste head out to the town of Gévaudan in search of the Beast, an enormous wolf-like creature that has slaughtered hundreds of people. Suspecting that the Beast is a curse-bearing vampire, Vanitas primarily aims to heal it using the powers of his grimoire. Along the way, the two get separated and suddenly travel back to the past—to the exact moment the Beast is lurking in the woods. After a battle against the gigantic wolf and a vampire hunter, Vanitas decides to team up with Jeanne in order to find Noé. Despite being allies, Jeanne's goal is the opposite of Vanitas', as she was tasked to kill the Beast—suspecting it may be someone she used to know. Meanwhile, a severely wounded Noé is picked up by the mysterious Chloé d'Apchier and her servant. Like Noé, Chloé is a vampire whose existence was erased from the public's knowledge. She has been a guardian for future generations and once tried to find a way to become human again. While Noé is grateful to Chloé for her hospitality, little does he know that she might be siding with forces far more dangerous than the Beast itself.