Start by Making Protons

A modern migrant worker travels back in time to an ancient prince. He originally thought he could sleep comfortably, but unexpectedly he turns out to be the most unpopular prince (the illegitimate son of the queen and another man). He didn't know who his real father was, but his adoptive father sent his cuckold son to an enemy country to be used as a hostage. It was a dead end from the beginning. I'm not willing to give in. It's not easy to travel through time, how can I not give it a try? Let's see how the little guy turns defeat into victory.