The man who called himself Haru sat cross-legged on the sandy floor of the cave, his back against the quartz-studded wall, his bandaged left hand cradled in his lap like a wounded animal. In the dim light, Riku could see the lines etched into his face—not the lines of age, but the lines of prolonged suffering, the kind that carved deep grooves around the mouth and eyes. Haru could not have been older than forty, but he looked ancient, a relic from a forgotten war.
"Forty-seven days," Yuki said, her voice carefully neutral. "How is that possible? The hunts last three nights. After that, the prey is either dead or released. That's what they told us."
Haru laughed, a dry, rattling sound that echoed off the cave walls. "Released. Yes. That's what they tell everyone. It's part of the game—the illusion of hope. If you believe you can survive and earn your freedom, you play by the rules. You run, you hide, you fight, but you don't try to escape the island. You don't try to expose them. Hope is the leash they put around your neck." He shifted his weight, and Riku saw the scars on his arms—dozens of them, old and new, a patchwork of healed wounds and fresh scabs. "I was like you once. I believed the lie. I survived three nights, and when the sun rose on the fourth day, I thought I had won. But they didn't release me. They put me in a cage and told me I was too entertaining to let go. I've been here ever since. Sometimes they hunt me. Sometimes they use me for target practice. Sometimes they forget about me for weeks, and I survive on rainwater and cave moss and the blind fish that swim in the underground pools."
Riku's mind reeled. Forty-seven days of torture, of hiding, of surviving against impossible odds. The man before him was not just a survivor—he was a witness, a living record of everything that happened on this island. "The passage behind the wall," Riku said. "Where does it lead?"
"Everywhere." Haru's eyes glittered with something that might have been pride. "The island is riddled with tunnels. Old mining shafts, I think, from before the Foundation bought the land. The Collector expanded them. He uses them to move around the island without being seen, to observe the hunts from hidden vantage points. I've been mapping them for over a year. I know every passage, every exit, every place where you can hide and never be found." He leaned forward, his voice dropping to a fierce whisper. "I know where the trophy gallery is. I know where they keep the records. I know where Takashima sleeps. And I know how to destroy them all. But I need help. I'm too weak to do it alone."
Yuki exchanged a glance with Riku. The skepticism in her eyes mirrored his own. Haru's story was extraordinary, almost too extraordinary to believe. But the scars on his body were real, and the message on the cave wall had been there long before either of them arrived. If Haru was a plant, a trap set by the hunters to lure them into complacency, it was an elaborate one.
"Why should we trust you?" Yuki asked, her hand resting on the hilt of her knife.
Haru met her gaze without flinching. "You shouldn't. Trust is a luxury that died on this island a long time ago. But I can give you something better than trust. I can give you proof." He reached into the folds of his tattered blanket and produced a small object wrapped in oilcloth. He unwrapped it carefully, handling it with the reverence of a priest handling a relic, and held it up for them to see. It was a human finger bone, small and delicate—the proximal phalanx of a left hand, cleaned and polished to a high shine. Engraved on its surface was a date, barely visible in the dim light: 10/13, Year 4 of the Reiwa Era.
"The Collector engraves every trophy," Haru said. "The date of the kill. He has hundreds of these, displayed in a gallery beneath the mansion. I found this one in a disposal chute six months ago. It must have been dropped by accident during a cleaning. I've kept it as evidence—proof that what happens here is real, that the people who died here existed, that their bones are not just fertilizer for Takashima's gardens."
Riku took the bone and examined it. The engraving was precise, almost mechanical, the kind of work that required steady hands and professional tools. He thought of the rib bone in his pocket, small and unmarked, pulled from the mass grave in the meadow. The contrast was striking: the pit was for discarded remains, the bodies that did not merit individual memorialization. The gallery was for trophies, each one a cherished memory of a kill.
"You said you know how to bring this place down," Riku said. "Tell us."
Haru nodded slowly. "The island's security systems are centralized in a control room beneath the mansion. Cameras, drones, communications, the perimeter fence sensors—all of it runs through a single network hub. If you can access that hub, you can shut down the entire system. No drones, no alarms, no way for the hunters to coordinate. It would level the playing field." He paused, his expression darkening. "But the control room is guarded day and night, and the network is encrypted. Shutting it down permanently would require something more drastic. An overload, perhaps. Or a fire."
"You're talking about destroying the mansion," Yuki said.
"I'm talking about destroying the machine that makes the hunts possible. The mansion, the network hub, the armory where they store their weapons—all of it is connected. A fire in the right place would spread through the service tunnels and take out everything. The guests would flee. The guards would be too busy evacuating to hunt us. And in the chaos, we could escape on one of the boats."
It was a desperate plan, full of holes and uncertainties. But it was the first plan anyone had offered Riku since he arrived on the island, and that made it precious. "You said you've been mapping the tunnels. Can you show us how to reach the control room?"
"I can do better than that." Haru pulled a folded sheet of paper from inside his blanket—a hand-drawn map, rendered in charcoal and stained with water and sweat. It showed the island in cross-section, with the mansion above and a labyrinth of tunnels below, each passage labeled in tiny, meticulous characters. "This is the result of forty-seven days of exploration. Every tunnel, every exit, every ventilation shaft that connects to the surface. Memorize it. If I die, this map dies with me."
Riku studied the map, committing the major passages to memory. The control room was located directly beneath the mansion's central courtyard, accessible through a service tunnel that branched off from the wine cellar. The armory was adjacent to it, separated by a single reinforced door. The trophy gallery was deeper, carved into the bedrock beneath the eastern wing, accessible only through a private elevator that required a keycard. And the Collector's private quarters were marked with a symbol Riku had seen before: the three interlocking circles, twisted into a knot.
"There's something else you need to know," Haru said, his voice dropping even lower. "The Collector isn't just a hunter. He's a surgeon. Before he came here, he was one of the most respected neurosurgeons in the Eastern Archipelago. He specialized in pain pathways—the nerves that carry pain signals from the body to the brain. He knows exactly how to inflict maximum suffering without causing death. That's why his trophies are hand bones. The hands have the highest concentration of nerve endings in the human body. He takes them as a record of the pain he has caused." Haru's own bandaged hand trembled as he spoke. "When he took mine, I was awake. He used a local anesthetic so I wouldn't go into shock, but I felt everything. He wanted me to feel it. He said it was a gift—the gift of pure sensation, the only thing that separates the living from the dead."
The cave fell silent. Even the distant crash of waves seemed muted, as if the island itself was listening. Riku thought about the surgeon described in the medical journal Akari had read—the brilliant pioneer who had vanished from public life after a scandal. The pieces were falling into place, forming a picture so monstrous it seemed impossible. And yet here was Haru, a living testament to the impossible, holding up his bandaged hand like an accusation.
"The hunters will be coming soon," Yuki said, breaking the silence. "If we're going to make a move, we need to decide now. Do we hide and wait for the third night, or do we act while we still have the element of surprise?"
"The second night is almost over," Riku said. "The banquet delayed them, but they'll be eager to make up for lost time. If we go underground now, we can use the tunnels to reach the mansion before dawn. The guards will be focused on the forest—they won't expect anyone to be inside the compound."
Haru nodded. "The tunnels connect to the wine cellar through a ventilation grate. It's locked, but I know the maintenance code. We can be inside the mansion within the hour." He paused, and a shadow crossed his face. "But there's something you should see first. Before we go. Something in the deeper tunnels."
He led them through the passage behind the false wall, into the darkness of the island's interior. The tunnel was narrow and low-ceilinged, forcing them to crouch as they walked. The walls were rough-hewn stone, glistening with moisture, and the air smelled of salt and minerals. Every few meters, a pale glow emanated from patches of phosphorescent fungus that clung to the ceiling, providing just enough light to see by.
They descended for what felt like a long time, the tunnel winding deeper and deeper into the bedrock. The sound of the sea faded, replaced by an oppressive silence broken only by their footsteps and the distant drip of water. Finally, the tunnel opened into a vast chamber, its ceiling lost in darkness, its walls lined with what looked like display cases. Riku's breath caught in his throat.
The trophy gallery was a cathedral of bones.
Hundreds of display cases lined the walls, each one containing a polished left hand bone mounted on a velvet cushion, each one engraved with a date and, in some cases, a name. The cases were arranged chronologically, starting from the far end of the chamber, where the dates went back more than two decades. The earliest specimens were yellowed with age, but the newer ones gleamed white under the phosphorescent light. At the center of the chamber, on a pedestal of black marble, sat a single case that was larger than the others. It contained not a single bone, but an entire articulated left hand, its fingers arranged in a gesture that was almost peaceful. The plaque beneath it read: THE FIRST.
"This is what they're protecting," Haru whispered, his voice hollow. "This is what all the murders are for. A collection. A monument to one man's obsession. Every bone in this room came from a living person—a person who was hunted, terrorized, and mutilated for the pleasure of the men upstairs. This is what we're going to burn."
Riku stood in the center of the gallery, surrounded by the evidence of decades of atrocity, and felt something shift inside him. He had been running on fear and adrenaline since the moment he stepped onto the island, but now a new emotion was taking root: a cold, implacable fury that burned away the fear like frost under a flame. He thought about the bone pit in the meadow, the rib in his pocket, the message on the cave wall. He thought about Daichi, who had died in the northern ravine without anyone to mourn him. He thought about Haru, who had survived forty-seven days of torture and still had the strength to fight back.
"You said you know how to destroy this place," Riku said, turning to Haru. "Show us. Show us where to start the fire."
Haru's eyes gleamed in the darkness. "Follow me. The armory is directly above us. If we can breach the floor, we can access the ammunition stores. A single spark in the right place will do the rest."
They moved through the gallery toward a spiral staircase at its far end, a metal structure that ascended into the shadows above. Riku took one last look at the display cases, at the hundreds of bones arranged like museum specimens, and made a silent promise to every soul that had been fed to this machine. He would come back. He would burn this place to the ground. And he would make sure the world knew what Kenji Takashima and his Collector had done.
But as they climbed the staircase, a sound echoed down from above: the unmistakable click of a door opening, followed by footsteps—slow, deliberate, accompanied by the tap of a walking stick on metal. A voice drifted down, smooth and cultured, with the same capital accent Riku had heard in the forest.
"Haru," the voice called, almost fondly. "I thought I smelled you in the lower tunnels. Have you brought guests to see my collection? How thoughtful. I was beginning to worry tonight's entertainment would be a disappointment."
The Collector was coming down the stairs. And he was not alone.
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