Both about school life and the impact a teacher can have on the lives of the students

Stories have similar vibe. Both deal with school life and both female leads are out of place in their own ways (one as a student, the other as a teacher). Also as the background stories of the leads is slowly revealed, you gain an understanding into why the characters behave the way that they do.

Similar storyline. Female leads lose memory, husband's face challenge of getting their wives to remember & fall in love with them again.

Both dramas about unification of North & South Korea and involve romance between a woman from north & man from south. Also has lots of action scenes

Underdog, not so good looking guys with little experience of relationships, going after a woman who would be considered out of their league.

Completely different genres, however there's no denying the bromance between actors Hwang Jeong Min & Baek Sung Hyun! So, if you want to see Goo Dong Baek & Han Sang Chul reunited once more (albeit in a different form) watch Blades of Blood. Brought back fond memories :-)

Both romantic comedies. Similar story lines. Older woman, younger male relationship. Both really fun to watch!

Continuation of first movie. A must watch if you've seen the first one!

Both female leads due to circumstances in their lives disguise themselves as males in their youth & young adult years. They later go on to become strong female leaders in male dominated surroundings.

Dramas about human-cyborg relationships with the cyborgs developing human characteristics & understandings

Both star Ashida Mana. About the lives of children from abusive/unstable homes

Both about teachers going above & beyond for the sake of their students