After My Father Rebelled, He Rewarded Me with the Emperor and Prince

Traveled Through Time and Became a Relative of the Emperor

Want to watch content similar to "Your Majesty, your great and unjust grandnephew has arrived!" Book. Even the emperor's sons all died in the power struggle, and there were no grandchildren. He traveled through time and became the emperor's grandnephew and had his brothers go to the capital together. Don't say that the two male protagonists don't know why.