What is the truth?

Mankin (Kishii Yukino) is finally getting closer to the truth behind the Eye of Horus murders. She tracks down the whereabouts of Kouki (Shison Jun), who has warned of the seventh crime, but Kouki points a knife at her...!? Kouki live-streams the incident, declaring, "I'm now going to show you a stage fitting for the end of this serial murder saga that I've created." What is the truth behind the serial murders that shocked all of Japan?! Everything is revealed in the shocking and tearful final episode!! What will remain in the end - love or hatred?