"After" the Holy Grail War

"After" the Holy Grail War (聖杯戦争の“その後”) is the description of the state of the world of Fate/Requiem.

Origin
There was a very large Holy Grail War in the past. The world is said to have become peaceful after it ended. Each person has obtained a Holy Grail, able to summon a Servant "bound to their fate." The only exception is Erice Utsumi, who later meets the "Boy", the "last Servant summoned into the world."

Holy Grail War
The previous Holy Grail War is described as very large.