Roppongi Class

Miyabe Arata, owner of the Roppongi Nidaime Miyabe bar, fights against those who have absolute power. His goal is to take revenge on Nagaya Holdings, a giant in the Japanese food industry. The owner of the holding companies, as well as his son, had a destructive influence on Miyabe Arata's life in the past.
(Source: jdramas)
~~ Adapted from the webtoon "Itaewon Class" (이태원 클라쓰) by Jo Gwang Jin (광진).