Where to Watch My Troublesome Buddy (2003)

Ken is a mean and stingy but successful salesman. One day he has a car accident and meets his own conscious. His Conscious just gives him seveb days to live. Ken convinces it to let him live on if seven people come and visit him. Disappointed by his colleagues' attitudes, Ken meets Tina, a girl who is as rude and mean as him. They finally change their bad personalities and Ken saves his own life by having seven visitors.