Mi-jin's ex-boyfriend. In the seventh episode of My Diary of Liberation, Kim Ji Won plays Mei Zhen who pays off the loan for her ex-boyfriend Michael Chen. The loan was made in her own name. Now my ex-boyfriend has failed to start a business and is unable to repay it. In order not to leave a bad credit record, Mei Zhen had to pay her own money first to let her know the relationship between Chen He and Mei Zhen.