Meg:
3GGG Would you mind me asking who plays the antagonist of Save Me? And is his obsession a big part of the plot?
Jo Sung Ha plays the antagonist, Baek Jung Ki. He is the leader of the cult, very influential and machiavellian. He is a truly demonic character, made even more so because these types of people exist in real life.
There is an undertone of romance to the show between the FL and the ML and 2ML, but it's very subtle. Instead, the show focuses more on them building a friendship as they try to help the FL.