Synopsis

In 2031, the war between humans and vampires ended. Humans were forced to make a coexistence agreement with vampires to establish a symbiotic area.
Cecily was the child of a human officer. Her parents had divorced before her birth and her mother died.
Due to her grandfather's death, she had to seek refuge with her father. However, she was humiliated by her stepmother and younger sister, and was forced to enroll in the only cohabitation school—Rockefeller College.
In the symbiotic region, the powerful vampires were the superior beings.
However, Cecily was mocked and ostracized at Rockefeller College. Yet, the vampires of noble ranking not only helped her but also stuck by her and even curried favor with her.
The overbearingly charming vampire Ansir forced her to live in his castle, demanding that she be his personal pet!
The kind and gentle Elvin visited her every day, telling her to come with him as he would fulfill all her wishes!
Cold Prince Herbert no longer acted cruel and merciless, telling her that everything around her is a facade and he is the only one that can be trusted.
Upon returning home, she discovered that the government, unwilling to be controlled by the vampires, was preparing a counterattack plan.
Cecily was requested to be an undercover agent to acquire information from vampires. Yet, due to her mixed feelings towards vampires, Cecily wanted to reject this mission but was then told that her mother was alive and imprisoned by vampires.
In order to find the truths and save her mother, Cecily agreed to the request.
Why was her mother imprisoned? What did the human government truly want?
Would her classmates be fooled by her disguise?