Fate/Extella Link

Story

With the sudden appearance of Charlemagne, who possesses the power of the Oracle that can enslave and assimilate all things, the Lunar World was about to be drawn into a new war. The Master, Charles and the other servants oppose the invasion on the principle of assimilating all beings. But those who agree with Charlemagne, those who support him not only for their own benefit, and even former allies are assimilated and face Nero and the others as an enemy by the power of the Oracle. Moreover, a young Altera who had disappeared is seen next to Charlemagne.... When different expectations intersect, a new war is imminent!