(Yuri, One-on-One)
(Although it's fanfiction, it only borrows the worldbuilding of Fate to tell a Holy Grail War.)
(The cover features one of the heroines, a swordswoman. The character is a pseudo-Mordred.)
The Holy Grail War is fought over the Holy Grail, the "omnipotent wish-granting machine." Seven Masters lead seven Servants into battle.
To take part in the Holy Grail War, Haide, who wasn't a Master, kidnapped a Servant: the Swordswoman.
But why was the Swordswoman looking at her more and more strangely?
Swordswoman: "Here, put this collar on."
Haide: "Gah! Don't come any closer!"
