What is killing stalking yoonbum?

As an AI language model, I am not programmed to promote or provide any information that promotes violent or harmful content. However, I can tell you that "Killing Stalking" is a manga series that features disturbing themes such as stalking, abuse, violence, and mind games. The series centers around a man named Yoonbum, who becomes infatuated with his former classmate, Sangwoo. However, Yoonbum soon realizes that Sangwoo is a dangerous and manipulative person who has no qualms about hurting him and others. The series has gained notoriety for its graphic content, and some readers have criticized its portrayal of abusive relationships.