Finn had slept on the floor.
This had been his own choice. When Orochimaru had opened the door to the guest room the night before, Finn had seen, in the order they registered: a shelf of labeled specimen containers, three dried snake skins on the wall, something anatomical in a jar, and, unmistakably, half a human arm hanging from a hook above the window. He had closed the door, retrieved a mat from the closet, and arranged himself on the living room floor without further comment.
Orochimaru's bed had its own risks, which Finn had chosen not to investigate.
He woke up with stiff shoulders, which resolved quickly once he stood and rolled the mat. For someone of his constitution it was a minor inconvenience, about as significant as a crease in his sleeve.
What he had not expected, opening the kitchen doorway, was Orochimaru making breakfast.
An egg was cooking in a pan. There was toast. The kitchen smelled like something normal.
"Are you hungry?" Orochimaru asked, without turning.
"Yes," Finn said, moving toward the bathroom.
"Do you need to defecate?" Orochimaru asked.
"You cannot keep doing this," Finn said.
"It's accurate."
"There are words that exist for a reason." Finn closed the bathroom door.
He understood now why cohabitation with Orochimaru was its own particular ordeal. In the Land of Birds, their schedules had been separate enough that this quality of the man had been mostly theoretical — Finn had known intellectually that Orochimaru referred to all biological processes in the vocabulary of a laboratory report, but knowing it and having it deployed at you over morning routines were different experiences. He thought of Sasori, who didn't eat, sleep, or require a bathroom in any form. Their coexistence made considerably more sense in retrospect.
When he came back out, the breakfast was on the table. He sat down, took a bite of the omelet, and stopped.
"This is very good," he said.
"Cooking is just controlled chemical reactions," Orochimaru said. "Combining ingredients to produce a desired compound. It's not complicated once you understand the underlying processes."
Finn looked at the egg in his fork. He thought about Sasori's similarly excellent cooking, and the fact that Sasori had arrived at it through the same analytical framework. There was apparently a school of thought — practiced exclusively by scientific geniuses with difficult personalities — that treated cuisine as applied chemistry and produced, through this lens, genuinely good food. He found this both impressive and slightly unsettling.
"The Three-Tails," Orochimaru said, after a moment. He had moved on from breakfast to the next item. "Is that your target for Danzo's contract?"
"Tentatively," Finn said.
He had been turning it over since the deal was struck. Danzo's offer was structured as a test of capability — produce a Tailed Beast, any Tailed Beast except the Nine-Tails. Every other one was held by another country, which meant any capture created diplomatic complications. The question was which one created the smallest problems while demonstrating the capability clearly.
The Three-Tailed Isobu was the obvious answer. Among the nine Tailed Beasts, the three-tails occupied a unique position: the Hidden Mist Village had never sealed it into a Jinchuriki. Instead, Isobu lived in a large lake near the village — free-range, content, essentially unsupervised, its natural temperament toward stillness making formal containment seem unnecessary. It had been there long enough that the arrangement had become unremarkable.
The Mist Village had their own plans for it during the war — a scheme involving sealing Isobu into a Konoha ninja and triggering a Tailed Beast rebellion inside the village, destabilizing Konoha from within. That plan had ultimately activated Obito and ended badly for everyone involved. But that was the future. Right now, Isobu was simply sitting in a lake.
The Hidden Mist was also, currently, the village that had entered the war against Konoha — the village that Konoha's dark world intelligence suggested was behind a bounty on the Land of Water's Daimyo. Taking something from them was, from Hiruzen's perspective, not entirely without quiet sympathy.
Beyond all of that: Finn had his own reasons for wanting the Three-Tails eventually. Isobu's presence in the coming years was tangled up with events in the Hidden Mist, with Obito's influence there, and with Nohara Rin in ways that were still some distance in the future. Getting ahead of that particular chain of events was worth considering.
"If you have time," Orochimaru said, "I'd like to come along."
"No problem," Finn said.
They finished breakfast. Orochimaru wiped his mouth, set down his chopsticks, and looked at Finn with an expression of focused expectancy that Finn had last seen on Sasori when he was about to open something he'd been working on for a long time.
"Shall we begin?" Orochimaru said.
"One question first," Finn said. "Can you do it somewhere other than the neck?"
Orochimaru was quiet. The conflict on his face was genuine, and he appeared to be reasoning through it with the care of someone for whom this was a meaningful concession.
"The neck is... structurally preferable," he said, carefully. Then, after a moment: "But another location is workable. If you insist."
"I insist," Finn said. "Firmly."
The night before, they had discussed the mechanics at length — how the seal functioned, how the natural energy delivery was structured, what Orochimaru expected the integration process to look like. Finn had been more resistant than he'd expected himself to be. The proposal was scientifically sound, the logic was consistent, and his Dark-Dark Fruit provided a genuine failsafe against any control mechanism embedded in the seal — it would simply absorb the binding element before it could root. The risk to him specifically was considerably lower than it had been to the twenty-nine previous subjects, all of whom had lacked any equivalent to that absorption property.
The resistance wasn't about the danger. It was something else, something harder to articulate. He had agreed in the end because the potential gain was real — a path to sage arts that didn't require Myoboku Mountain's gatekeeping or Ryuchi Cave's survival lottery — and because Orochimaru's theory was the best he'd encountered on the subject.
"Where?" Orochimaru asked.
Finn looked around the room, turned options over, and arrived at the obvious problem: he didn't want the mark to be visible. That ruled out the face, the hands, anywhere above the collar. Everything else was covered by clothing, which created its own complications regarding what Orochimaru would need access to.
He extended his left arm, turned it so the inside of the wrist faced up. "Here. And do it fast before I change my mind."
Orochimaru looked at the wrist. Then he looked at Finn's face. Something in his expression was professionally satisfied in the way of a researcher who has secured agreement from a difficult test subject after a lengthy negotiation.
His neck extended.
Not metaphorically — Orochimaru's throat and neck physically elongated, stretching outward from his shoulders in the boneless, fluid way of a snake's body, his head moving through the air on this extended column of flexible flesh. The Soft Body Modification technique — one of the items he had given Finn in the scroll, demonstrated now in the most direct possible way. He was not entirely human in structure, and had not been for some time. The modification had been voluntary and gradual and was now simply part of how he moved.
The strike was fast. A flash of motion, pressure against the wrist, a sharp clean pain that resolved immediately into something stranger — a current of foreign energy pushing inward through the puncture point, spreading toward the surrounding tissue, and then stopping. Something inside Finn's chakra network pressed back against it, not quite fighting, more like absorbing — the Dark-Dark Fruit's pull gathering the invasive force within a defined perimeter and holding it there.
Then the sensation faded. The energy settled. The area went quiet.
Orochimaru's head retracted to normal position. He looked at the wrist.
Finn looked down.
On the inside of his wrist, a pattern of magatama shapes had appeared — three curved comma-marks arranged in a tight cluster, dark against his skin, the design precise and unfamiliar and faintly wrong in the way that marks placed there by means other than ordinary means tended to look.
He turned his wrist over and back. The mark didn't hurt. It wasn't hot. The energy that had been introduced was still present somewhere in the wrist's surrounding tissue, contained rather than integrated, waiting.
"How does it feel?" Orochimaru asked. He was watching the mark with the close attention of someone monitoring an experiment in its first minutes.
"Strange," Finn said. "But stable." He flexed his fingers, checked the range of motion. Everything worked. "How long before it does anything?"
"That depends on your constitution," Orochimaru said. "For the previous subjects, the reaction was immediate and fatal. For you, I expect the timeline to be different." He paused. "We'll observe."
Finn looked at the mark one more time.
Three magatama. Dark, precise, and faintly unnerving.