The Hidden Rain Village was built for rain.
Every rooftop angled sharply downward at the edges. Every wall was studded with drainage pipes — thick iron ones, thin copper ones, gutters bolted in overlapping rows — all of it designed around the fundamental assumption that the sky would never stop. The metal gave the architecture a cold, industrial weight, like a city that had long since accepted its weather and built itself accordingly.
At the apex of the tallest building in the village, Finn sat cross-legged on the roof.
A faint aura moved around him, slow and uneven, like heat off stone. His hands rested in a loose circle at his abdomen. Anyone who had themselves touched the threshold of Sage Mode would have recognized the shape of what he was doing — the deliberate, patient pull of natural energy into the body, steady and continuous, breath by breath.
The marks had appeared on his face. Two lines of black ran across his eyelids in a manner that was more unsettling than it was elegant, and between his brows, a diamond shape had begun to press upward through the skin, not quite solid, not quite gone. The immortal mark. The final threshold.
He was close.
Then something changed. The aura around him broke apart — not disturbed from outside, but withdrawn deliberately. Finn released the natural energy on his own terms, and opened his eyes.
"Who's there," he said quietly. Not a question.
He sat with it for a moment, rain tapping against the pipes below. Then the corner of his mouth moved.
"So you couldn't wait any longer." A low sound in his throat, almost amused. "Black Zetsu."
The Rain Tiger at Will technique had been his for over a month. He had taken to it quickly — more quickly than he had expected, if he was being honest — and from the day he completed it, the Hidden Rain Village had become an extension of his senses. Every drop of rain that fell within the village's perimeter was, in a sense, touching him. As long as the rain continued and his chakra maintained the technique's operation, nothing moved in this village that he could not feel.
A moment ago, in a narrow alley two districts over, something had emerged from the ground. The chakra signature was nearly nonexistent — so faint that conventional sensory techniques would have slid right past it, found nothing, moved on. The Rain Tiger at Will didn't miss absences. It mapped the rain itself, and the rain had parted.
Finn had confirmed it with Observation Haki immediately after, locking his perception onto the specific location. The Haki had found them — found both of them, Black and White Zetsu moving through the village like shadows that had decided to go for a walk.
He had noticed something in that moment that corrected a longstanding misunderstanding. It wasn't that Observation Haki couldn't detect Zetsu. It was that it naturally deprioritized them, the way the eye slides past something that doesn't read as a threat or a presence worth tracking. The Haki required deliberate focus, a conscious decision to look at the exact spot where they were. Once he did that, they were as visible as anyone else.
He filed the distinction away.
Then he stood up, straightened his hakama, and walked toward the door at the top of the stairwell. He had already sent Juzo.
Biwa Juzo materialized behind them without a sound.
Black Zetsu felt it half a second before the voice came — the subtle pressure of a large body entering the space at his back, moving with the unhurried confidence of someone who had already decided how this encounter was going to go.
"Well, look at that," Juzo said. "There really are two of them. Looks like some kind of pitcher plant."
Black and White Zetsu turned simultaneously.
The man standing there was carrying a sword across his back that was nearly as wide as his torso. He had arrived via Body Flicker — close enough that he could have already drawn. He hadn't. He stood with his arms loose at his sides, grinning with the specific brightness of someone who found the situation more entertaining than threatening.
Black Zetsu ran through what he knew. Biwa Juzo. Core member of the Yorozuya. Formerly of the Seven Swordsmen of the Mist.
Around them, subtly, the rain was slowing. Not stopping — shifting. The drops in their immediate vicinity seemed to hang for a fraction longer than they should before falling, as if the air itself had taken an interest in keeping them in place. And on the flat of the enormous blade behind Juzo's shoulder, blue-white arcs of lightning crawled in slow, restless patterns.
He's gotten stronger, Black Zetsu noted, with genuine surprise. Considerably stronger.
"Who are you two?" Juzo said, the grin settling into something more businesslike. "You snuck into the Hidden Rain Village. If you don't want to die, now's the time to start talking."
Black Zetsu did not attempt to negotiate his way past the question. He had not come here to fight, and starting a brawl with one of Finn's named subordinates in the middle of Finn's village would be a catastrophic opening move. He kept his tone level and direct.
"We apologize for the intrusion. We are here to pay a visit to the owner of this place — the leader of the Yorozuya, Lord Rodriguez Finn. We represent the will of a significant figure in the ninja world and wish to discuss potential cooperation."
Juzo tilted his head. "A visit." He drew the word out, testing its shape. "If you're here on a visit, you present a calling card at the gate. You don't crawl out of the ground in a back alley." The lightning on the sword's edge pulsed once, brighter. "Makes people think something's wrong."
He was going to push this until I acknowledged the breach properly, Black Zetsu calculated. He gave it to him. "You're correct. The approach was inappropriate. We accept that. But whatever consequences follow from that should be Lord Finn's decision to make, not something settled here between us — agreed?"
Juzo looked at him for another moment, as if weighing whether the point had been made clearly enough. Apparently it had. The sword's lightning quieted.
"Fair," he said. "But I'll say it plainly: sneak in like that again, and I'll cut you both in half with one stroke. You understand what you're dealing with here."
White Zetsu, whose personality had always been less disciplined than his counterpart's, couldn't entirely help himself. "I'm curious — my infiltration technique is genuinely advanced. How were we detected?"
Juzo's grin came back. "All that proves is that you're a frog at the bottom of a well." He said it without any particular heat, like he was stating the weather. "In this village, nobody escapes my boss's perception. Nobody."
Black Zetsu absorbed this.
Finn noticed us before Juzo even arrived. He sent Juzo. Which means he was already watching when we came up from the ground.
Has he been watching us on other occasions too?
Is he the kind of person who notices and simply... doesn't bother to respond?
That last possibility was the most unsettling one. A man who could track your movements and found you too unimportant to react to was a man operating from a completely different ledger than the one you had been using to evaluate him.
"Follow me," Juzo said. "And don't look around."
He turned and walked. Black and White Zetsu fell into step behind him.
The route to the tallest building took them through several residential blocks. Civilians passed without particular reaction — Juzo clearly wasn't a face they associated with anything that required their attention. The ninja patrols were different. Every one of them straightened when they saw him coming. Lord Biwa Juzo. Said quickly, said with care. He acknowledged each greeting with a brief nod and kept moving.
The black cloaks with red cloud patterns were doing their work. Whatever those garments signified in this village had been established thoroughly enough that even the greeting was structured — there was no confusion in the patrols about rank or protocol. The Yorozuya had taken a conquered village and made their hierarchy legible to everyone inside it in under two months.
Efficient, Black Zetsu thought. And quietly oppressive. The kind of management structure that runs without visible friction because everyone has already calculated the cost of friction and decided it wasn't worth it.
They were approaching the front gate of the tallest building when Juzo stopped.
He stopped the way someone stops when they've been waiting for a thing to happen and it has happened on schedule. He turned slightly and said, in a register that was clearly not aimed at his current company, "Lady Shirabayashi."
Black Zetsu looked up.
A woman was walking out through the gate.
She moved unhurriedly, with the carriage of someone accustomed to being looked at and entirely indifferent to it. The combination of qualities she carried was difficult to categorize — a composed elegance that had something cool and sharp running underneath it, like a blade wrapped in silk that you'd realize was there only if you pressed too hard. Even Black Zetsu, who had no particular relationship with aesthetics, registered the incongruity of it and found it difficult to immediately resolve.
More interestingly: Juzo had greeted her before Finn's name. That said something about positioning.
Black Zetsu ran through his inventory of the village's inhabitants. He had nothing.
Whoever she is, she arrived after we stopped monitoring this location.
The woman gave Juzo a faintly pained look. "Juzo, I've asked you to just call me Yui. You don't need to be so formal."
"With respect, Lady Shirabayashi," Juzo said, without any indication he planned to change his approach, "I call it as I see it. Please don't mind."
Kakuzu wouldn't have said it. Orochimaru wouldn't have said it. Sasori certainly wouldn't have. Black Zetsu understood what the distinction meant without needing it explained — this was a man who respected Finn deeply enough to extend that respect outward, as a matter of personal conviction rather than organizational protocol.
Which also communicated something about the woman's relationship to Finn that no title could have conveyed more directly.
Then a second figure appeared behind her, moving quickly and calling out sister with the unfiltered energy of a child who didn't yet have a tactical reason to muffle herself. The girl looked about twelve. Black Zetsu's gaze went to her face, and something there produced an immediate, quiet disruption in his composure.
The features were different. The face had been altered — not clumsily, but thoroughly, the way Orochimaru would do it. But the bone structure underneath, the way the eyes sat, the particular quality of the expression as she looked toward Shiraki Yui and fell into step beside her.
That's Nohara Rin.
The woman took the girl's hand without breaking stride. The two of them walked past, Juzo stepping aside to give them room, and they were gone around the corner.
White Zetsu turned to Juzo with the open curiosity of someone who had decided that one question wasn't too many. "Who were they?"
"Lady Shirabayashi Yui and Lady Shirabayashi Mai," Juzo said, in exactly the tone of a man reading from a script he had committed to memory. He said nothing further, and walked through the gate.
Black and White Zetsu followed.
They had been in the Hidden Rain Village for less than ten minutes.
Black Zetsu moved through the gate in silence, turning the situation over.
The Rinnegan, taken. The Gedo Mazo, sealed. Nagato, dead. The Rain Country, absorbed. And now Nohara Rin is walking around this village under a different name, as a member of Finn's household.
My intelligence has been wrong. Not on a small detail. On something structural.
How long has she been alive? And how long has Finn known?
The last question was the one that made the most difference. If Finn had known from the beginning and said nothing, if he had built this entire arrangement around a piece of information he'd decided to hold indefinitely, then everything Black Zetsu thought he understood about the man's position and intentions needed to be reconsidered from the beginning.
This person, Black Zetsu thought, following Juzo deeper into the building, is considerably more complicated than I prepared for.