As the 13th prince, Noah was originally outside the line of imperial succession, so he lived a carefree life in the territory he was granted.

However, when the Crown Prince died before the Emperor, the imperial succession was to be fairly contested among the remaining princes.

Noah, who had unwittingly acquired unparalleled power precisely because he lived a carefree life as a mere prince, ended up overwhelming the other princes with that power and eventually became the Emperor, the most powerful ruler on Earth.