A Wacky Switch (2004)

A Wacky Switch 2004 / 나두야 간다 2004 / Nadooya Kanda , Naduya Ganda

Dong Hwa is a complete loser, whose first novel called 'I met Kafka' brought the publishing company bankruptcy. To bring home the bacon, he tries to drive a taxi but only ends up running over someone. One day, Dong Hwa is offered a job to do ghostwriting for a CEO named Man Chul, who turns out to be the ringleader of the biggest criminal syndicate in Korea. Dong Hwa soon finds himself perfectly at ease in the mob, while Man Chul starts learning about the other part of the world. (Source: AsianWiki)