As a Park Hae Joon fan I must say, this actor sure brings his best to the screens.

I wish this movie wasn't so underrated. I think it deserves far more recognition than it has.

The story is easy to follow, it has an insane amount of realism and to myself it gave plenty of material to overthink about it afterwards. I think plenty is to be learned from this masterpiece as it shows how regret can shape out a person - or how missed opportunities ruin people and why you sometimes must listen to others instead of being stubborn. - It can ruin your life. So a simple mistake.

I also think that this movie brutally shows the truth behind success and also the truth behind schooling system in Asian countries not just South Korea. So - all the violence presented and put onto children in schools (because Asians are kind of obsessed with good grades and almost always put school before children's emotional needs).

I wish many people would watch this film as it has all of it. Cinematic effect, realism and overall a simple to follow and heartbreaking story. Not to mention good acting and casting.