Korean Drama "One Ordinary Day" is a crime drama that focuses on the culprit, his journey throughout the court case, and his transformation from being an ordinary young man to a grown-up with no emotions towards what is happening around him.

The drama is character-centered, with masterful performances from everyone, but especially by Kim So Hyun, who proves once again that he is a top-tier actor. His chemistry with his partners was also a factor that aided in the success of the drama.

In addition, the mystery is well constructed, and the drama has a smooth pace that allows the character development, as well as the events to unfold naturally. However, the ending is not what one should expect by watching the rest of the drama. It was rushed, and not explained at all. Not to mention that the finale was almost open.

So, overall, 8.5 out of 10.