The fourth year of Keian in Edo.
In Japan, where the war had ended and peace had arrived, a ritual was about to begin.
Clang! Clang clang!!!
The sound of a bloody battle unfolding in the dead of night.
Blood splattered, and the clashing of swords resounded.
There are seven Masters and seven participating Servants... such is the setup.
Including the wanderers summoned by the Grail, there are a total of 15 Servants.
And, there was an adjudicator chosen by the Grail.
"From the start, why are we having such a large-scale war in a flawed ritual... I don't get it."
"Is that so? But I believe we must do our best."
"I can't summon Servants because of restrictions, you know. I should've saved some Saint Quartz, but I used it all up last time."
A ritual carried out with each harboring their own desires.
At the center of that ritual stood a man and a woman.
For mediation? No.
Then for what purpose?
To destroy this absurd ritual.
"Honestly, it's stranger that I'm here with you rather than Mash. Won't Mash be jealous?"
"That would be a bit troublesome... Still, since I consider this a valuable experience, I think it's fine."
"I also think you look cool with a sword. Since Masters usually fight here, should I transform too? Let's see... Would Okita be good? Or how about Saito? What do you think?"
"Hmm? Well, I believe that no matter what, Dumpty will surely do well."
"... You're fundamentally the same after all. Then, shall we go? Kyrielight."
"Yes! Mash Kyrielight, sortieing!"
Fate/Grand Order X Fate/Samurai Remnant
It is a story of the sword.