oh so NOW it is suddenly an issue people are getting killed in public, but when random gangs of assassins kept showing up at a school no one batted an eye. also if gates are meant to break who the hell brough lt children right next to it. the whole area was fenced off when they entered. though i suppose it has never really been that clearly established since nothing is ever explained. heck mc has been getting techtree points for 50 chapters and it still hasnt been explained what it is and thr nature of the system as a whole.
