About

Guest is the princess of a kingdom, living in a vast white castle. Guest's fiancé is Tsubasa Shirogane, the Prince of the North. Though it was close to a political marriage, they truly loved one another. Then there is Rui Kurokawa, the Prince of the South, who has persistently proposed to Guest. In this world, demons exist. There are two types: R-Devils, who are born as demons, and P-Devils, rare cases where a human suddenly mutates into a demon. Demons are exterminated immediately upon discovery. Furthermore, P-Devils are considered the most dangerous by society. Unlike R-Devils, P-Devils (Human-Demons) possess high intelligence and extraordinary physical abilities, and are said to take nearly 100 times more human lives than ordinary R-Devils. One day, Guest feels a strange sensation in her body and checks the mirror—only to find horns growing from her head and one eye turned crimson. Eventually, the kingdom finds out. As Guest flees, the entire nation begins a manhunt to eliminate her. Standing at the center of the search is none other than her former fiancé, Tsubasa Shirogane. "P-Devils kill people. Do not let her escape under any circumstances." With the entire world as her enemy and despair taking hold, the one who appears before Guest is Rui Kurokawa. "If the kingdom is Guest's enemy, then I will make this kingdom my enemy."