Yusa leaves the cabin, erasing all evidence that would surely arouse suspicion that he was involved in Kaoru's death. Yusa begins to take care of Kaoru's only son, Katsuki, not knowing that this encounter is the beginning of a great change to Yusa's destiny.

Yusa is suspected of Kaoru's murder, and the police are believed to be involved in the robbery case that Kaoru was following just before her death. In the meantime, evidence found in Yusa's place links him to the robbery.

Despite the seeming conclusion that Honjo was responsible for both cases, it seems obvious that someone wants to bring an early end to the cases. This makes Yusa and his team pursue their investigation even further.

Saimon reveals to Yusa that Nanbu is the mastermind behind the crime, but Nanbu has an ironclad alibi. Despite this, Yusa still harbors doubts about Nanbu's innocence.

The organization known as Nippon Noir remains a mystery, with speculation surrounding their size and purpose. The situation takes a dangerous turn when Yusa is unexpectedly attacked by a masked man.

Yusa is now suspected of Kishi's murder. The police are on his trail and put Yusa on a nationwide wanted list. While on the run, Yusa has flashbacks of Kaoru's confession.

Yusa sneaks into the basement of the police hospital and discovers a mysterious experimental facility. There, Yusa remembers Kaoru's shocking revelation.

A covert police group called Nippon Noir conducts secret human experiments aimed at personality correction. Meanwhile, Yusa begins to recover his lost memories one by one.

The death of Miyagi, a human experiment subject, transforms Yusa from simply angry to another person entirely. Yusa then asks a certain individual what he did to Yusa's body.

After regaining all his memories, Yusa heads to the cabin where it all started. He uncovers the truth behind Kaoru's murder, the 1 billion yen in Nippon Noir funds, the man in the gas mask, and why his memory was erased. Everything is finally revealed.