Yuuya's gramps must have hacked the other world, or grinded it into submission because all the stuff in that house is cracked as heck.
The manga about Cheat Skills is living up to its name. At least he's still maintaining his good-person stats, on top of him being stacked/gaining fat stacks/stacking his luck to oblivion.
This is pure catharsis and I'm feeling guilty pleasure reading it.