RBK-090 A female special agent who has fallen into darkness. The tragedy of Ecstasy Trigger! Kana Kusakabe

Kana Kurosaki has been appointed to be in charge of investigating the serial killer X. However, there is little information about X, not only his name but also his identity is unknown, and there is not even a proper photo of him. Kana's father, Goro, who was once a special investigator, also worked hard to investigate X, but he died in the line of duty. Kana visits Eiji Kagami, a former subordinate of her father's and the man closest to X, and asks for his cooperation in the investigation. However, this