Ok, my first work of Yoo Seung Ho, and since then I think of him as a great actor. He will certainly be a fabulous actor of his generation and one of the most famous and awarded. I loved this movie, it's a teen kind of thriller... The romance was great and the thriller even better. I couldn't figure who the murderer was until the very end (even though I knew the librarian was in it too; it's always the librarian for my great sorrow since I am one myself). Moving on... This movie has a great argument and was very well shooted. And I couldn't think of a better cast. Also represents accurately the korean highschool and it's prejudices. A definitly watch.