Moon

This drama is about human psychology—how people, when their emotions are at their peak, say and do things without thinking, which eventually end up hurting themselves.
It pulls you into the complicated world of marriage and relationships, where cheating is clearly wrong and being cheated on is deeply painful. But how you handle it also matters. Trying to hurt the other person in return only leads to both sides suffering, and there are no winners in the end.
What makes their relationship even more complicated is that, even as time passes, the couple still hold on to familiar feelings of love and attachment toward each other, while at the same time hating each other for making their lives miserable. They are caught between love, attachment, resentment, and pain, making it difficult for either of them to truly let go.
The lead actors portray all of these conflicting emotions incredibly well, making their characters’ pain and struggles feel very real. The acting of every other actor is also superb. The OST songs are also heartbreaking and reflect the lead characters’ emotions very well. Together, the performances, story, and music make this one of the well-made K-dramas of its time. I highly recommend it.