In 1995, a serial strangulation case occurred in Tokyo, with five people killed and the perpetrator nowhere to be found, making the case a mystery. In 2017, just as the case had already passed the validity period of the lawsuit, a man named Yasuto Zengen (played by Ryuya Fujiwara) published a confession book titled "I Am a Murderer", claiming to be a serial killer
In 1995, a serial strangulation case occurred in Tokyo, with five people killed and the perpetrator nowhere to be found, making the case a mystery. In 2017, just as the case had already passed the validity period of the lawsuit, a man named Yasuto Zengen (played by Ryuya Fujiwara) published a confession book titled "I Am a Murderer", claiming to be a serial killer