Ren didn't sleep that night.
He sat at Takeshi's kitchen table, a blank notebook in front of him, his pen moving in small, precise strokes. Not writing—diagramming. Connecting names and places and dates into a web that only he could understand. Kenji's known associates. Kenji's shell companies. Kenji's favorite restaurants, hotels, and hiding spots.
Takeshi had given him access to his investigation files two days ago. Ren had read everything—every interview transcript, every surveillance photo, every dead-end lead that had gone nowhere. Most of it was useless. But some of it—a small fraction—contained patterns that Takeshi had missed.
Kenji was careful. But he was also predictable.
He always stayed within a certain radius of the city center. He never used the same safe house twice, but he always chose buildings with back exits and basement parking. He had a preference for neighborhoods with narrow alleyways and limited CCTV coverage.
Ren mapped it all. A heat map of Kenji's possible locations. Seven neighborhoods. Twenty-three buildings. Three hundred and forty-seven rooms.
Too many to search alone.
But he wasn't alone.
At 6 AM, he called Kobayashi.
"I need you to file a motion," he said.
"At six in the morning?"
"The court opens at eight. I need it filed by nine."
Kobayashi was silent for a moment. "What kind of motion?"
"A request for Hikari to be moved to a different group home. One with better security. One where Kenji doesn't have people on the inside."
"The court denied that request yesterday."
"They denied it based on lack of evidence. I have evidence now. The staff member who passed Kenji's message—I have his name."
Kobayashi's voice sharpened. "How did you get his name?"
"Hikari described him. I cross-referenced the description with the group home's staff directory, which is publicly available online. There are only three male staff members who match her description. One of them has a criminal record—assault, ten years ago. His name is Yamashita Koji."
"You found all of this in one night?"
"I don't sleep."
Kobayashi sighed. "Fine. I'll file the motion. But you need to understand—even if the judge agrees, moving Hikari will take time. Days, maybe. In the meantime, she's still in danger."
"Then we need to find Kenji faster."
"Ren—"
"I'm not asking for permission. I'm telling you what I'm going to do."
He ended the call.
---
Takeshi found him an hour later, still at the kitchen table, the notebook now covered in diagrams.
"You look like hell," Takeshi said.
"I've been productive."
Takeshi looked at the notebook. His eyes widened. "Is this... is this a map of Kenji's possible locations?"
"It's a probability map. Based on his past behavior, his known associates, and the locations of his shell companies." Ren tapped a cluster of buildings on the west side of the city. "He's most likely here. The Nakano area. Lots of short-term rental apartments. Easy access to the Chuo Line. Close to Shinjuku, but not too close."
Takeshi sat down across from him. "You did this in one night?"
"Six hours."
"That's... terrifying."
"Thank you."
Takeshi studied the map. His finger traced the cluster Ren had identified. "I know someone in Nakano. A former informant. She might have heard something."
"Then we go today."
"We?"
Ren looked up. "You said you'd help. I'm holding you to that."
Takeshi was quiet for a moment. Then he nodded. "Fine. But we do this my way. No heroics. No running off on your own. If we find him, we call the police. We don't engage."
"Agreed."
Takeshi didn't look convinced. But he stood up and grabbed his jacket.
"Let's go."
---
The informant's name was Momoko.
She was in her fifties, with dyed red hair and a face that had seen too much. She ran a small bar in the back alleys of Nakano—the kind of place that didn't have a sign, didn't have a menu, and didn't ask questions. Takeshi had known her for years. He said she was "reliable," which Ren translated as "dangerous but trustworthy."
Momoko looked at Ren with sharp, assessing eyes.
"He's young," she said to Takeshi.
"He's the one I told you about. The prodigy."
"That's not what I asked." She turned to Ren. "How old are you?"
"Seventeen."
"And you're hunting a man who's connected to the Sakamoto network?"
"I'm hunting a man who threatened someone I love."
Momoko's expression flickered. Something softened behind her hard eyes.
"Sit down," she said. "Both of you."
The bar was small—six stools, a counter, a shelf of bottles that probably contained more dust than alcohol. Momoko poured three glasses of something clear and strong. Ren didn't drink his.
"There's been talk," Momoko said. "Whispers. Someone's been asking about safe houses in the area. Someone with money. Someone who doesn't want to be found."
"Kenji," Takeshi said.
"Maybe. The description matches—tall, handsome, expensive suits. But there's something else." She leaned closer. "He's not alone. He has protection. Two men, maybe three. Armed."
Ren's jaw tightened. "Where is he staying?"
"I don't know. But I know someone who might." Momoko pulled out a napkin and wrote down an address. "A building in the northern part of Nakano. Mostly short-term rentals. The owner is a man named Sato. He doesn't ask questions, but he also doesn't keep secrets. For the right price."
Takeshi took the napkin. "How much?"
"Five man. For the information. Another five if you want me to keep your names out of it."
Takeshi pulled out his wallet and counted out ten thousand-yen notes. Ten of them. He handed them to Momoko.
"Keep the change."
Momoko smiled—a thin, sharp smile. "You're still the same, Tanaka-kun. Reckless with money. Reckless with your life."
"Some things don't change."
"No," Momoko agreed. "They don't."
---
They found Sato's building at 2 PM.
It was a six-story concrete block, nondescript, the kind of building that blended into the gray Tokyo landscape. A sign in the lobby listed apartments for rent—short-term, no deposit, cash only. The perfect place for someone who didn't want to leave a paper trail.
Takeshi stood by the entrance, his hand in his jacket pocket. Ren knew what was in that pocket.
"I'll go in alone," Takeshi said.
"No. We go together."
"Ren—"
"You said no heroics. That goes for you too."
Takeshi stared at him for a long moment. Then he nodded.
They walked into the lobby. A small desk sat near the elevator, attended by a man in his sixties—bald, overweight, with small eyes that missed nothing.
"Sato-san?" Takeshi asked.
The man nodded. "Who's asking?"
"A friend of Momoko's."
Sato's expression didn't change. But something in his posture shifted. "I don't know any Momoko."
"Sure you don't. But you know a man named Takahashi. Tall. Expensive suits. Paying cash for a short-term rental."
Sato was silent for a long moment. Then he stood up.
"This way."
He led them to the elevator, pressed the button for the fifth floor, and didn't speak again until the doors opened.
"Room 512," he said. "He checked in three days ago. Paid for a week. Comes and goes at odd hours. Never stays out late."
"Is he there now?" Ren asked.
Sato shrugged. "Haven't seen him since this morning. But his men are in the room across the hall. 511. They don't leave."
Takeshi nodded. "Thanks."
"Don't thank me. I didn't tell you anything." Sato walked back to the elevator. "And I never saw you."
The elevator doors closed.
Ren and Takeshi stood in the hallway. The walls were beige. The lights were fluorescent. The doors were identical—cheap wood, cheap locks, cheap everything.
"Now what?" Ren whispered.
"Now we wait." Takeshi gestured to a stairwell at the end of the hall. "We find a spot where we can watch the door without being seen. And we wait for Kenji to come back."
"How long?"
"As long as it takes."
---
They waited for six hours.
Takeshi sat on the stairs, his back against the wall, his eyes fixed on the small window that looked out onto the fifth-floor hallway. Ren sat beside him, his phone in his hand, the battery dying slowly.
At 8 PM, they heard footsteps.
Ren tensed. Takeshi put a finger to his lips.
The footsteps grew louder. A man appeared in the hallway—tall, broad-shouldered, wearing a dark coat. Not Kenji. One of his men. The same man who had been in Ren's apartment weeks ago, the one with the scar above his eyebrow.
The man walked to room 512, unlocked the door, and went inside.
Takeshi exhaled. "Not him."
"I know."
"We keep waiting."
They kept waiting.
At 9 PM, Ren's phone buzzed. A message from an unknown number.
Stop looking for me, Akiyama-kun. You won't find me. But I'll find you.
Ren's blood went cold.
"He knows," he whispered, showing Takeshi the phone.
Takeshi's face went pale. "How?"
"I don't know. But we need to leave. Now."
They stood up, their legs stiff from hours of sitting. Ren's heart was pounding. His mind was racing. Kenji knew they were here. Kenji had been watching. Kenji had—
The door to room 512 opened.
The man with the scar stepped out. He was holding his phone, a small smile on his face.
"Leaving so soon?" he said. "The boss wanted me to give you a message."
Ren said nothing.
"Stay away from Hikari. Stay away from the case. Stay away from everything." The man's smile widened. "Or next time, we won't be so polite."
Takeshi's hand moved toward his jacket.
"Don't," the man said. "I have friends in room 511. Armed friends. You draw that gun, and this hallway becomes a shooting gallery. And I don't think you want that, do you, Tanaka-san?"
Takeshi's hand stopped.
"Good boy." The man stepped back into the room. "Now get out of here. And remember what I said."
The door closed.
Ren and Takeshi walked to the elevator. Neither of them spoke. Neither of them breathed until they were outside, in the cold night air, the city lights blinking in the distance.
"He's playing with us," Takeshi said.
"I know."
"He wants us to be scared."
"I know."
"Are you?"
Ren looked at Takeshi. His face was calm, but his eyes were burning.
"Yes," he said. "But I'm not going to stop."
---
They drove back to Kamata in silence.
Takeshi parked the car, killed the engine, and sat in the darkness for a long moment.
"We need to tell Kobayashi," he said finally. "And the police. About the building. About Kenji's location."
"They won't do anything without proof. We have no proof."
"Then we need to get proof."
"How? He knows we're looking. He'll be gone by morning."
Takeshi was quiet. Then he said, "There's another way. A way I didn't want to mention."
"What way?"
"Someone I know. A hacker. She can get into any system—cameras, phone records, bank accounts. If anyone can find Kenji, she can."
"Why haven't you used her before?"
"Because she's dangerous. Because she doesn't work for free. Because once you involve her, you can't go back."
Ren didn't hesitate. "Get me her number."
"Ren—"
"Get me her number, Takeshi."
Takeshi sighed. He pulled out his phone and scrolled through his contacts.
"Her name is Akemi. She's in Ikebukuro. I'll text you the address." He looked at Ren. "Don't say I didn't warn you."
Ren took the address.
He would go tomorrow. He would find Kenji. He would end this.
No matter what it cost.