A vampire only has one heartbeat in its life. Chen Yanlin is Zhou Cheyun's personal blood servant. Chen Yanlin has a special characteristic: immortality. Zhou Cheyun never thought that he would have a heartbeat for such a special human being. However, after a few years, Chen Yanlin's blood has been flowing in Zhou Cheyun's body. The same blood flows into two different hearts, binding them tightly together.
Intention: Eternal life is also a kind of pain
