Is the Female Colleague a Vampire? but I Am an Immortal!

My name is Jiang Han, a victim of the catastrophe 200 years ago, a mutated human who lived for 216 years. If someone discovers my secret, I will be arrested and dissected by the research institute and become a victim for the development of new drugs. Therefore, I have to move every ten years. Later, I moved to a coastal city called Lucheng and met a beautiful girl named Bai Yiluo. I am going to fall in love with her for the 20th time in my life. But I found that what she seemed to like was not me as a person, but the blood in my body. My name is Bai Yiluo, and I am a vampire living on Blue Star. I must rely on blood to maintain my life. Since I was born, I have drank chicken blood, bird blood, fish blood... But I have never drank human blood. Until I met a young man named Jiang Han, for the first time, I felt a desire for human blood. This world is too dangerous. I want to make a blood pact with him and fight alongside him. PS: None of the protagonists are normal humans.