Office Worker in his late thirties

Arnold is looking at the mirror, he is Caucasian male about 5'3" with very thick glasses and bit overweight and small penis. He has always been an introvert. The only thing that he has is an very old coin that is a family heirloom that has been passed on for generations. His family comes from a mage family, but as he is not the oldest he is unable to cast a spell. He can sense magic however.

He is about to head out to his basically dead end job when he sees a green light produced magic. He then sees three tattoos on his hand that are command seals. A gorgeous woman forms out of thin air and is standing on top of him. She is nude except for jewelry of her homeland. She has long legs, shaved pussy and perfectly shaped tits.

She says with an accent, "You are a master for the next holy grail war, but this is very different war. It does not have ending and feed off your of your lustful release."

She releases her hand that gives off spell that gives off powerful spell that causes a great pain along his crotch. He passes out and when he wakes up he is on the bed with his new servant groping this body and he notices that his cock is enormous and shaved.

He looks at his alarm and realize that he is going to be late to work. He also realizes that he is participant of the holy grail war, but he should not be involved in this war. He recognizes his servant as ...