It depends on how long you are exposed to Korean dramas on a daily basis. It wouldn't be easy to overcome your addiction in just overnight, you have to commit with the process of giving up that addiction. Just like any other kind of abstinence, you will experience withdrawal symptoms such as anxiety, lack of concentration, irritability, etc, and it's normal. What I hate about this whole "Korean drama addicts" thing is that, people don't actually give any solution to any addict asking for a way to come out. You may google and see it for yourself. I'll just copy and paste some of them for everyone to see:
Come on… you dont have to get rid of K - drama addiction. Itd much better than addiction of bad habits.
i think instead of getting rid of them why dont you watch any current korean drama so that you can wait for a week to watch them … you can save time and it hardly takes 3 hours for two episodes every week..
LOL! Do you really expect an answer for this! According to me, you watch more and more and more drama's until you know what the next scene is gonna be for any drama and become sick and tired of it.
And this, they are giving you advices on how you should quit Korean drama addiction with a K-drama imagery. This looks more like an attempt to ridicule the effort to quit. It's being treated more as a "guilty pleasure" than a real addiction:
Just because it seems harmless compared to any other kind of addiction, doesn't mean it is. It's just as dangerous as drugs and alcohol addiction. Just don't believe those who try to glamorize this addiction as something acceptable and normal.
Now, pointing out what someone said above about how you can just "watch more and more dramas until you become tired and sick of it" is really not a solution. When you're addicted to something, you know it's bad but you keep doing it anyway. Even when you've reached the 'climax' or the 'peak' of whatever it is, even if you've tried many kinds of it, when it's an addiction, you can't quit by doing that same thing over and over again.
My best advice would be,
finish whatever business you're doing. If you're still on episode 10 but there are still 3 episodes left, finish it. Then you have to completely stop it. You don't want the unfinished business to disturb you later.
The next step would be,
switch to other hobbies that aren't destructive. I switched to languages learning and tutoring, kinda wish I had used all the time I spent on my addiction doing something else.
Last but not least,
don't count the days you've spent away from that addiction. Although it totally depends on how you want to get rid of this addiction: partially or totally, I'd recommend the latter. When you count the days, it just breaks the essence in abstinence. Also, that way you're more prone to relapse, or going back to become addicted to your addiction. Even when you have a relapse, just don't give up, continue your abstinence, remind yourself why you're doing this in the first place.
I recommend this website to read on how to overcome K-drama addiction:
http://healthblog.yinteing.com/2013/09/22/you-know-you-are-a-korean-kmovie-drama-addict-and-how-to-manage-this-addiction/
http://healthblog.yinteing.com/2013/09/24/how-to-overcome-addiction-towards-korean-drama-and-movies/
When you're in doubt, please seek help in the general/health community (neutral), and not in a community full of people who treat this addiction as some kind of a guilty pleasure. Or you can actually talk to your friends who are not interested in this K-drama business at all, or just loathe it. You can ask them why they hate K-dramas or something like that, it's a way to open your mind. Good luck!
Source: I once was a game addict, thriller/gore/slasher/horror movies and series addict to the point where I was fascinated by the darkness, and every brutal scene just got me.