Even if they reach the level cap prior to a class up, guys who become adventurers either don't want to enter a guild or are wannabe criminals.
What I want to make is a private army that will listen to my instructions, not guys who are just strong.
After the weak become strong, complaints will be raised. At any rate, I would have to deal with those kind of guys in the distant future.
“And, how do I reset the level?” (Naofumi)
“Firstly, put on this choker and stand on the magic circle in front of the Hourglass of the Dragon's Era.” (Soldier)