What is behind the Yonsei University medical school student’s shocking crime and perfect score on the CSAT?

1. The man knew that the woman’s family was wealthy, so he registered the marriage with the intention of opening a private hospital after graduation.

2. The woman told everything to her parents.

3. The woman’s parents tell her to file a lawsuit for invalidity of marriage.

4. A man whose marriage plan seemed like it would go to waste gets into a fight with the woman.

5. In the end, the enraged man stabs the woman with a knife and kills her.