I watched a looottt of korean drama xD
Playful Kiss (Kim Hyung Joon from Boys over Flowers is in there as a "mean" lead guy), Coffee Prince, Heartstrings (This time, Yonghwa and Park Shinhye from You're Beautiful have a happy ending), Shut up! Flower Boy Band, Flower Boy Ramen Shop, Cheondamdong Alice (Though it is on the slower side. It's about Fashion designing :3), Flower Boy Next Door (Again, on the slower side), Dream High 1 (Revolves around Kpop, but REALLY GOOD FOR KPOP ACTORS :3), Dream High 2 (DO NOT COMPARE IT TO DREAM HIGH 1, it'll just make it look crappier. Honestly, if this drama stands by itself, it isn't that bad :3), Full House (An older one), Full House Take 2, Mary Stayed out all Night (Jang Geun suk from You're Beautiful is there, as well as the main girl from Cheondamdong Alice), Love Rain (Really sweet, you should watch this. Jang Geun suk from You're Beautiful is there. And Yoona from SNSD), Queen Inhyun's Man (I LOVE THIS!!), Rooftop Prince (Slow at first but still hilarious. Then it just suddenly gets FRIKIN AMAZING). Reply 1997 (SO CUTE :3 Eunji from APINK is there and Seo In Guk, a singer, are the main leads), My Princess (A great drama :3), Secret Garden (Just flat out amazing), Goong (Really cute and lovely :3), Personal Taste (This one is just plain adorable. Lee Minho from Boys over Flowers is the lead guy), Pasta (it's about chefs, but this is really cute. Especially how the main guy is loud and demanding and the girl is just so afraid of him at first xD), God of Study (Doesn't have a load of romance, but hey! It's still good, and gives tips for studying lol), To the Beautiful You (Not the best best of dramas, but it's pretty decent and has Minho from SHINee and Sulli from f(x) )
I know this is a long list, but most of the dramas here you will not regret watching at all :3