Doona Kdrama, Is It Worth Watching?!

I just started watching Doona yesterday when I got free time and so far, it's good to me. But, I can't help but get scared for the guy. The happenings at the start gave me a glimpse of a sad journey for the guy. I mean, it felt so obvious how Doona intentionally wanted to play at the start. (at least only at the start?) It's like a bad girl toying with a good boy trope all over again. So later, the guy who said to the girl not to fall in love with him would be the first one to actually fall in love with her. It's like literally a challenge to the bad girl Doona to prove the opposite for him. And probably later, Doona would feel she's in love upon seeing the good guy exerting efforts for her despite continuously breaking his heart. Ugh, this feels so familiar even in real life. lol 

I have no idea how the story would actually unfold but upon seeing Facebook spoilers, it seems like this drama would end in a not so good one for both. Honestly, I don't know if I still should continue knowing the sad ending would come. And a few people on my Facebook page says that this drama was boring for them... hmmm... what do you think? Is Doona worth watching or was it only overhyped because of good looking actors as leads? Let me know!!!