Emperor of Great Britain

Where am I? What is this place? The protagonist's name is Qin Feng. He was originally a college student who traveled to an unknown place due to a car accident. When Qin Feng investigated the body, he was surprised to find that this place was actually the Middle Ages and he was the son of Richard the Lionheart, King of England. His name was Richard Lunge. He found out that he was only 15 years old now. In a few days, he would soon be 16 years old. In the Middle Ages, 16 years old was the age of adulthood. What should I do now? At this moment, a guard came in and knelt down and said, Your Royal Highness, the king, has something to do with you. After knowing it, Richard the Lionheart said to you after coming to the room, "I will let you go to Jerusalem in a few days. Why?" Because it seems not too late to go to Jerusalem before you come of age and tell me about the mistakes in your heart. You can set off in three days.