After my parents passed away, I unexpectedly awakened to the art of disguise. He was forced to take over the "mess" between the human race and the demon race. On one side is the fiancé (contractual) of the demon prince in name only, and on the other side is a top-notch vampire pursuing the love debt of three generations. In order to survive, I had no choice but to: establish the Symbiosis Academy and conclude a peace contract; establish the Soul Suppression Department to handle cross-border cases full-time. From a little transparent person in the nameless temple, to the director in charge of order in both worlds. When I finally stood firm, the legendary cold-blooded snake prince pressed the fake marriage contract against my heart: "The contract is indefinite. Now, I want it to become real."