Anime Crossover: The Unlucky Salaryman Dragged into the Holy Grail War

(In this story, due to a twist of fate, the protagonist knows absolutely nothing about the Holy Grail War or Type-Moon. The world isn't part of the Type-Moon universe either, and the Holy Grail War has been slightly modified. I couldn't be bothered to work out things like Servant status screens, so I left them out entirely. There are both original and anime characters, and I've given the protagonist a few cheat abilities. After all, if he didn't have any, what would be the point of transmigrating?) After dying and transmigrating, Li Siyu thought he had simply been reincarnated. One day, a work assignment took him to Camelot City. Just as he'd finally found a cheap inn where he could rest, a tremendous noise suddenly came from outside. He looked out and saw several strangely dressed people fighting. The next moment, his hand started itching. When he looked down, he found a tattoo had appeared on it. Just then, the others set their sights on him and began hunting him down. He thought he was sure to die, but after fleeing to his rental apartment, a magic circle suddenly appeared on the floor, and a figure stepped out of it to save him. Then the figure asked Li Siyu if he was its Master. Though his English wasn't very good, he still understood the question. At first, he had only wanted to get out of this mess, but somehow he ended up on the path to saving the world? But the farther he got, the more bewildered he became. What the heck was Ultraman Belial? And what about that one over there, Kamen Rider Saber? So this really is the real Saber? What do you mean, I can transform too? This transmigration was totally worth it. I even got an officially licensed Bandai toy for free.