It was fairly good until it reached the end... and then it kinda got ruined. I think that the authors wanted it to end with an unexpected plot twist, but failed to deliver it in the right way, because the ending just feels kinda rushed really. (It's not entirely bad... just leaves you with a sort of WTF-just-happened kind of feeling). Kudos to BoA, anyway, in her first big role on screen. Her acting was good, considering she's mainly a singer. All of the main characters appeared to be somewhat lacking in one way or another, but at least some of them managed to improve themselves.