if you are new to korean drama world , so you must watch these dramas first :

1- Boys over flowers :

https://www.dailydot.com/wp-content/uploads/44f/44/81f904cd1690e9c50a2158d82ad41d21.jpg
Boys Over Flowers is the number one go to drama for newbies. It was the very first K-drama I watched and while it may be somewhat old since it first aired way back in 2009, it is regarded as a K-drama classic among fans and critics.

2- The heirs :

http://tidbit.happyheartandmind.com/wp-content/uploads/2014/01/heir-300x300.jpg

3- City hunter

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRiz7owHW3Ik6thDh2BsPxBkvwCgihqVQe3MZxFzRmZfL1Mu6APlQ

4- Descendants of the Sun:

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS0tFCzkh-aF1jLEJaR3rGKB-KOnLeLIunGDq77akTCcf9MVd_60g

5-*Healer*:

https://media.senscritique.com/media/000008365980/source_big/Healer.jpg

6- I hear your voice :

http://img.csfd.cz/files/images/user/profile/159/231/159231668_97e4e4.jpg

7- Goblin

https://www.dramafever.com/st/img/nowplay/4914_Goblin_Nowplay_Small_oxgPcrm.jpg

8- Thek2 :

https://upload.wikimedia.org/wikipedia/en/a/a2/The_K2_%28%EB%8D%94_%EC%BC%80%EC%9D%B4%ED%88%AC%29.jpg

9- My love from another star

https://www.dailydot.com/wp-content/uploads/c71/c1/4325_MyLoveFromAnotherStar_Nowplay_Small.jpg

10- Hwarang : The beginning :

https://www.nautiljon.com/images/drama/00/57/hwarang_the_beginning_2175.jpg
this one will change your opinion about historical kdramas if u ever feel like they are useless

of course those are not the only best dramas in kdrama worlds , but i wanted just to give you a hint about how great they are.

i hope my article was helpful for you .