Most Toxic Kdrama

Every Korean drama have different types of characters. Sometimes we just don't realize how  toxic the character or plot is . and if it is the main character it creates a big impact on some fans . So lets see your thoughts on the most toxic Korean drama. YOU CAN ALSO ADD THE KDRAMAS YOU THINK SUIT THIS TAG

NOTE I did not said that the drama wasn't good or that I do not like them. It just means either the storyline or characters have high level of toxicity.