The Holy Grail War’s Fated Zhang San

My name is Zhang San. I used to be an outlaw beyond the law, guilty of every crime imaginable, and I lived a legendary life. I had no choice before. Now I want to be a good person. When I was a student, I was taught by El-Melloi II. Now I work for Chaldea, the Human Order Preservation Organization, studying under the Iron-Fisted Saint, the Sword Saint of Britain, and the Ax King of Uruk. A mage's romance is a punch that splits the heavens! Before I knew it, I became humanity's last Master, a hero who would save Human Order. Fate/Grand Order... Ten-pull summon, begin!