Comprehensive Sims System

Nangong Yan, a software engineer, traveled to another world after his liver exploded...
Nangong Yan: "What kind of ghost system is this?! There is no system wizard, I have to study everything by myself!"
Boom!dong dong~!
Nangong Yan: "I know! Go right away!"
……
Nangong Yan: "System, you don't have a system wizard, right? But why do I feel like you're mocking me?!"
Looking at the "Floor Language LV6" on the skill panel, Nangong Yan let out a roar of fury...
PS: There are missing chapters, not many