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...

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...!

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!

Certain his twin is alive, Senri shifts his goal from avenging his brother to finding him. Enan is happy to join the search, relieved to see her friend's face light up with hope after living in darkness for so long. Following the threads of distant memories, Senri uncovers new clues that suggest his parents' involvement in a tangled plot, one that may well have led to their deaths. And now, as events continue to unfold, Senri fears Kazuto may be wrapped up in the sinister dealings of the city's underworld as well. Has the homicidal "fire" man twisted his kind brother into something unimaginable...?!

Desperate to find and stop his brother as soon as possible, Senri reluctantly agrees to meet with Detective Wakazono. The offbeat officer has his own reasons for wanting to find-and finish off-the "fire" man, but Senri is determined to beat him to it. Armed with new information and the few clues surrounding his parents' deaths, Senri and Ena journey through the countryside, piecing together the past. Each step leads them closer to Kazuto...but they aren't the only ones hot on his tail...!

Discontent to remain in the shadows, Wakazono leaks police documents concerning Three-Eyes’s true identity to the press—including a photo of Senri! While the release forces Senri out of the public eye, Wakazono hopes the threat against him will force Kazuto to act, revealing himself and giving him a chance to kill the “fire” man. Unfortunately for Wakazono, he has no idea just what kind of person he’s been dealing with...