The Jessames family, which ruled vampire society in ancient times, was the pure-blood king of vampire society. However, the current vampire society was handed over to the Senate by the ancestors of the Jessames family.
In modern times, the legend of vampires is not over yet. The Karen Lotz family, the knight family that protects the Jessames family, and many Level Bs all live like humans. The secret protected by the Wild School and the government is their existence, so the school has established a night department. However, the current pure-blood king Jessames She and his sister Jessames Yui, as well as the knight Karen Roz String who protects their family, studied in this school. Xian still doesn't know they are vampires? Why is that? What secrets do these two siblings, Yuyi and Xie, have? Why didn't they tell Xian that they were vampires?
The game begins.