This drama is insane! All the characters have problems. Some have psychological problems as well! LOL. But seriously this is a dark drama. Sometimes there were times where I wanted to drop this because I got so frustrated with the characters. Even so, I kept watching because the story kept me interested. I still get chills thinking about Katsumi. He is one sick dude! Overall though I feel this drama is important and everyone should watch. I sure learned a lot=)