Fireball blues

I thought of quitting on this film after the first 15 minutes when I noticed that the fucking thing is almost two and half hours long. Should I spend that much time with a South Korean movie - and that only because I don't know about the local cinema. But I stuck on with it because it was kind of captivating. The story. Boy meets girl. The girl meets another boy. The first boy gets jealous. The second boy confesses of having a suspicious hobby. The girl disappears. The first boy desperately wants to find her. And it's a pretty good mystery.