A booklet that was a partially revised collection of previously unseen plot elements and setting details by Nasu Kinoko and character designs by Takeuchi Takashi that were originally penned for the 2006 Fate/Stay Night anime, but were cut. The booklet was published in 2019 for Fate/Stay Night's 15th anniversary.
The booklet is notable for introducing Tachie (Fate), an unused character design that would later be developed into Mash Kyrielight with the release of Fate/Grand Order.