in train to Busan, the incident takes place in train and then one train to another train....while in happiness it takes in South Korea but the final whole incident and main part in the apartment. really love happiness drama and the herein and hero roles are amazing.

almost similar but in Love in Sadness her husband cares only about his wife wherein in Let Me Introduce Her he cares about his view what others things.

One of the best and scariest dramas I have ever watched. The storyline was so great. I like this drama very. good story