- Both are highly tense mystery thrillers that’ll have you on the edge of your seat
- Amazing performances from both leads
- In both of these dramas, the leads have a ride or die relationship and would do anything for each other.
- Amazing chemistry between the leads of both dramas
- Both dramas do a really good job of “showing and not telling” the story (usually through the use of flashbacks)
- Overall both dramas are just really well written

* Second chance romance
* Lots of insightful moments with amazing writing
* Top notch chemistry between the leads
* Amazing cinematography
* Mature romance

- Amazing Chemistry between both of the leads
- Both of the novels that these two dramas are adapted from are by the same author (Twentie)
- Both are coming of age stories that just feel very… real.

- Both of these dramas are coming-of-age stories about chasing your dreams.
- In both of these dramas, the MC is an athlete (Heedo from 25-21 is a fencer, & Yu cheng from falling into you does high jumping).
- both of the main couples in these dramas have really good chemistry with lots of swoon worthy moments.