hey can someone explain this to me,like first wjat did doosik do to that cation guy? and s...

hey can someone explain this to me,like first wjat did doosik do to that cation guy? and second shirashis hyung the blonde mafia did quit right? then why is the uke going to meeting while being intoxicated he still wants to attend thw casino meeting?? i dont want to read pearl boy can someone help me out w backstory