Just the kind of drama I try to avoid. I mean, life is already so tough. Why watch such sad dramas and make it worse for ourselves? That aside, the story is obviously beautiful. Really good acting. In the beginning I was really annoyed how the so-called friend died just because he came second in an olympiad. I mean, DUDE, I participated in Math Olypiad once and my rank was...well, let's just leave it to 'not second'. HOW CAN HE BE SO UNTHANKFUL?? And If you ask me, there's nothing more selfish in the world than suicide. Once you die, you're free. But your loved ones have to endure all the pain of losing you and also deal with the consequences of your death. And what Tae Woong's friend did crumpled him and he pretty much wandered aimlessly, drenched in guilt, for 8 eight whole years. He quit school (quite a shame considering what a genius brain he had. Whenever he spoke all mathematically, it felt like an alien language :P). He even left his home (pissed his mom quite a bit. But she accepted him later on). But then he found Bo Ra (again). In the beginning, I hated her. But towards the end she became my favorite character. Ugh. It's just so sad. I don't think I'll be able to watch it again. Cried so much.