I can't say I really liked this drama although I watched 10 / 16 episodes .
It was quite interesting at first and I really wanted to see what had happened that night but the more the plot was proceeding the more boring it would get. Like another user said "Devilish Joy is a drama packed with cliche and corny scenes." I have to admit that after the 6th episode I had to fast forward most parts and eventually drop it.
Also , I don't think there was really a chemistry between the main leads or at least it wasn't ideal for me. The only character I really liked was Hoya's. He was really funny.