Jangmiwa Champagne

Lee-Won, who works as a poor lawyer in Russia, visits City Councilor Zdanov, who is in conflict over Nikolai's commission, and there he meets the mafia boss, Caesar. Behind City Councilor Zdanov, there was a mafia involved. The meeting between the two is extraordinary.
(Source: Lezhin, edited)
Note: Chapter count includes 37 side story chapters and 1 special.