Yoo Hye Jung and Hong Ji Hong (Doctors)
The actors, Park Shin Hye and Kim Rae Won had a huge age difference so it could probably be one of the reasons why their characters had zero chemistry.
Although there are times when the actors can pull it off so we can just brush it off and say age is just a number, unfortunately,
this couple had no chemistry at all and their student-teacher relationship was also quite disturbing.
