Both dramas have the same theme, additional lessons from tutors to enter prestigious schools / colleges.

The main character in both dramas also has the same profession, a tutor.

Both films have something in common, the main female character has a rare, severe disease..
Both films are very romantic. (look at the poster LOL)

Both main characters solves murder cases that are riddled with difficult clues.
Both are recruited by the police to solve cases and both are young men who like girls so much.