Fate/Stay Night Unlimited Blade Works
Having spent the last 10 years of his life studying under a mysterious sorcerer, Shirou Emiya has become a Magi. But when he inadvertently summons the legendary female warrior Saber, Shirou is sucked into the ultimate battle: the Holy Grail War. Now, Shirou and Saber must join forces with Rin Tohsaka and her servant Archer if they want to survive. But when the tables turn, it may be their ally who becomes their greatest enemy yet!