Fate/Grand Order: Himuro no Tenchi - 7-nin no Saikyou Ijin-hen
English name: Fate/Grand Order x Himuro's World: Seven Most Powerful Great Figures Chapter
Genres: Comedy
Type: Special, Episodes: 1
Aired: Dec 31, 2017
Studio: ufotable
Source: Game
Rating: PG-13 - Teens 13 or older
Synopsis:
The source material follows three girls — Kaede Makidera, Kane Himuro, and Yukika Saegusa — at Homurahara Academy, but has nothing to do with the efforts to restore the Human Order.

(Source: ANN, edited)