I don't know how System actually works—I don't own one—but I am sure it works just the same like status windows in games. That means, all of the Heroes don't have to actually learn how to fight since they can purchase any Skill or Mastery they want.
I guess that's why Yūto's stance is perfect but too rigid. It is apparent that he has mastered whatever Combat Skill he has purchased, but I can tell it is not his yet; it feels like I am watching another person controlling his body.
"Well, I guess there is still a good thing in not being granted a System." Smirking, I take out two cheap daggers from my Spatial Storage. "Let's test the kid with these babies first."
The daggers I arm myself with were given by a good Orc blacksmith in Scentillion. They are by no means high quality daggers nor are they Relics to begin with.