The Emperor's Peace Summoned from Another World

Once he traveled through time, he became a prince whose father did not love his mother. I was careful and cautious until I was 15 years old, and finally became a king. However, I was told that I had to be a hostage. Okay, if that's the case, then I won't pretend anymore. Let's start the chaos summoning system! Let's see how a modern young man comes to this troubled world where thousands of races are competing for the top position and hundreds of schools of thought are contending. With the help of the system in his hand, he can complete the unfinished unfinished business that has lasted for thousands of years.