The trashy young master with the system

Cale will have a system after waking up from being killed in war against the white shit. So it's going to be what I think the Original Cale would be like after that happened.

Will he get his slacker life?
Will Choi Han beat him into a pulb again?
What will happen now that he's gone back in time?
What is this system?
And moreover Why is one of the first tasks to get drunk?

Let's read and find out.