I'm Your Undead Fan

One day, Duan Feng suddenly received a friend request on WeChat. He glanced at the other person’s username, “I Am Your Zombie Follower,” and ignored it. However, when Duan Feng woke up and opened his phone to check the class group messages, he accidentally discovered that “I Am Your Zombie Follower” had already automatically added him as a friend. To prevent people from adding him at will, Duan Feng had specifically set his account so that anyone applying to add him as a friend had to pass his verification and receive his approval. So how had “I Am Your Zombie Follower” become Duan Feng’s friend without his approval? Even more puzzling, Duan Feng tried repeatedly to delete and block “I Am Your Zombie Follower,” but never succeeded. Could his WeChat have been infected with a virus? What astonished Duan Feng even more was that, ever since “I Am Your Zombie Follower” became his WeChat friend, his life had grown bizarre. He often felt as though an invisible pair of eyes were watching his every move. Who exactly was “I Am Your Zombie Follower”? Why was it interested in Duan Feng, and why did it know everything about what he had done each day?