This was a very interesting plot with many possible developments. Here are some possible scenarios: The boy was an outstanding politician and military strategist. He had always dreamed of inheriting the throne when he was growing up. When he grew up, his brothers doubted his ability and thought he was not suitable to be king, so they began to plot to seize the throne. The boy's brother is an evil force. They hope to use the boy to achieve their evil purposes. The boy realized his brother's true intentions and decided to take action to protect his country and throne. The boy's brothers knew that they could not defeat the boy, so they began to plot a plot to make the boy give up the throne voluntarily and let them take the throne. The boy realized it was a trap but decided to keep quiet until he could make the best decision. The boy's brothers knew that they could not defeat the boy, but they hoped to use the boy to gain the support of other countries in order to achieve their evil purposes. The boy decided to use this opportunity to expand his power and try to protect his country. These are just some possible plots. You can write your own novel according to your own ideas. The important thing is to let the reader feel the boy's determination and indomitable spirit to make him the protagonist of your story.