The Nuclear Sword Fairy from a certain cartoon

Shirou, who traveled through the Fourth Moon War, was forced to enter the Holy Grail War.
Yesterday reappears, blank class card, Son of the Sun, Unlimited Sword System...
Death and protection, madness and mystery, heroic spirits and bonds, fake things and real things will eventually be intertwined.
Every day that I have never danced is a disappointment to life.
Come, let us fight until dawn——
"This body is definitely made of the infinite sword!"