Most people don't choose reincarnation. Reincarnation finds their way to them. Perhaps they did something great in their life. Or maybe truck-sama wasn't looking where it was going. But without fail, those who reincarnate are destined for something great. A new life where everything changes for the better. But... Reincarnation isn't always the greatest thing. Sometimes you just draw the short end of the stick. Di Tou just happens to have drawn the shortest stick. Pulled out of his life randomly. Taken by a crazy old eccentric man not as a disciple, but as a body double?! And a janitor body double no less?! Grasping a system to find... It's a JANITOR SYSTEM!? Truly, how unlucky can one get?
Of course, as Di Tou had observed, it was mainly in terms of attire and bearing. Although a good chunk of the students remained separated, sticking to their own little groups and revealing details to Di Tou who was observing them for the first time, the majority were mingled together and acting like normal youths their age. Thinking about it, even those who had cliqued themselves off should be considered a good example overall speaking, as in the current world, it was just about impossible to see nobles interacting with commoners on equal or even reasonable terms.
In the same manner, the sects who generally believed they had dominion over the lands and kingdoms, feeling as though the kingdoms only existed because it made management easier would also disdain to interact with the commoners and even the nobility, who they simply saw as dressed up pigs.