Senri Nakajou's twin brother was his everything, the one who protected him from their abusive father, the one whose pain he felt as his own. That is, until the day thirteen years ago when Senri's entire family was murdered before his eyes. He couldn't have cared less about his parents, but without his brother, his world ended. Ever since, finding the killer and making him pay has been Senri's only goal...and now-finally-he's caught a glimpse of a clue...!

Through Kazuto’s eyes, Senri sees more clearly why his brother has begun stepping away from the murderous path laid out for him by the rat. Risking a meeting with Mask Man’s associates, who have their own reasons for wanting to find Kazuto, Senri discloses his suspicions of a Three- Eyes copycat in hopes of uncovering new information that will lead to his twin. What he learns will confirm his theory, but it will also place the threat much closer to home...

Senri's hunt for his twin heats up as a rival criminal group sets Kazuto and the "fire" man's hideout ablaze mere minutes after he and Enan finish their search. As he draws closer and closer to his brother, the danger only seems to increase, and so too does Senri's recklessness. He feels sure Kazuto is reaching out to him, yearning to meet as much as he is, but Kazuto has a long history with the "fire" man-and a terrible burden to bear...

Though Kazuto has lived for years with a bullet lodged in his brain, the childhood injury is starting to take its toll. Uncertainty over his future may explain why he has chosen to reach out to Senri after so long, even if his methods remain frustratingly roundabout. Meanwhile, Senri and Enan are on the cusp of unraveling the events that separated the twins in the first place—but not if the “fire” man has anything to say about it!

Though the “fire” man’s trap would have forced Senri to join Kazuto as his murderous partner in crime, Senri manages to keep his cool, sparing the person he was meant to kill. Safely reunited thanks to the twins, the rat imposter and his family are able to provide new details about Kazuto—and, more importantly, a handwritten note! Kazuto’s words are the first Senri has heard from his brother in over a decade, but while they confirm some theories, Senri is still no closer to finding out where Kazuto is...or what he might be planning next!

While Senri’s methods have become more methodical over time, Wakazono has abandoned police procedure and the bounds of the law in his pursuit of the “fire” man. Hoping to curb further violence, Enan goes to see Wakazono—but she isn’t the only one who has business with the dirty detective. For the first time, Enan catches a glimpse of Kazuto before he disappears into the night. Whatever mysteries remain, protecting what is precious takes priority for the twins as they find themselves thrown into turmoil by Wakazono’s schemes...

For thirteen years, Senri has made it his mission to take revenge on the man with the "fire" scar who took his twin brother from him. Recognizing his pursuit will require a certain amount of funding, Senri has saved and schemed for years, but his latest get-rich-quick con has just been cracked wide open! With his associates in danger, Senri stands to lost everything he's built. It may be a costly setback, or it may be fate has given him a new avenue for tracking down his brother's killer!