Naruto turned one year old on October tenth.
Kushina made a cake with orange frosting because orange was apparently Naruto's favorite color, a preference he had demonstrated by grabbing every orange object in the house and defending it with surprising territorial aggression for someone who couldn't yet walk unassisted. The cake had a swirl pattern on top that Minato had drawn with careful precision using a toothpick, and it looked exactly like the seal on Naruto's stomach that nobody in the room was supposed to know about except Minato.
Kenji knew about it.
He had known since before Naruto was born. The Nine-Tails was sealed inside his brother — that was fixed, immovable, a fact of this world's architecture. What Kenji had spent the last year trying to change was everything around it. The part where Minato died doing the sealing. The part where Kushina died too. The part where Naruto grew up with nothing but the village's fear and his own stubbornness for company.
That part was not acceptable.
He had been preparing for this night since he was old enough to hold a strategy in his head. He was six years old now, which in the shinobi world was old enough to understand death and in his specific case was old enough to have a detailed operational plan for preventing it.
The problem was that his plan had several variables he couldn't fully control.
The first variable was Obito.
In the original timeline — the one Kenji carried in his memory like a scar — a masked man identifying himself as Madara Uchiha had manipulated the Nine-Tails into attacking Konoha on the night of Naruto's birth. That masked man was Obito Uchiha, who was supposed to have died years ago and hadn't, and who had arrived at his current state of catastrophic decisions through a series of tragedies that Kenji understood intellectually and found heartbreaking in the abstract and could not spend emotional energy on right now because there were more immediate concerns.
The second variable was the Nine-Tails itself. Even if Kenji could disrupt Obito's intervention, Kushina's seal weakened during childbirth and the Nine-Tails had a will of its own. The creature was not simply a weapon. It was ancient, intelligent, and furious, and managing it required more than disrupting one man's plans.
The third variable — and this one kept him up at night — was himself. He was six years old. His chakra reserves were above average for his age but nowhere near what this situation would require. His taijutsu was solid at an academy-graduate level. He had useful items in his inventory. And he had something more valuable than any of those things: he knew exactly what was going to happen, when, and in what sequence.
Information was leverage. Leverage was everything.
He had told Minato three weeks ago.
Not everything. The full truth — that he was a reincarnated soul from another world with a supernatural leveling system — was not a conversation he was ready to have and possibly never would be. But he had sat down with his father in the training ground and said, in the most measured voice a six-year-old could manage: "I need to tell you something about the night Naruto was born. About what's going to happen."
Minato had gone very still.
"Someone is going to come that night," Kenji said. "A masked man. He's going to use a technique that lets him phase through physical matter — attacks go through him, nothing connects. He's going to interfere with Mom's seal and use the Nine-Tails against the village."
The silence that followed was the longest Kenji had ever sat through.
"How do you know this," Minato said. It was not phrased as a question.
"I can't explain the source," Kenji said. "I know that's not a satisfying answer. But I need you to believe me, and I need you to prepare."
Minato looked at him for a very long time. Kenji held the eye contact and didn't elaborate and didn't back down. He had learned, over six years of watching his father work, that Minato Namikaze made his most important decisions in silence, and interrupting that silence was the fastest way to derail them.
"The phasing technique," Minato said finally. "Is there a counter?"
"Timing," Kenji said. "The phase has a window. If you can read the transition point — the moment between phased and solid — you can hit him. You've done it before." He paused. "You will do it. I mean — you're capable of it. I've seen your reflexes."
Minato absorbed that phrasing without commenting on it. "What else?"
"You can't do the sealing the same way you planned. The way you planned it — " Kenji stopped. Started again. "There's a version of tonight where Mom survives. I need that to be the version that happens. Whatever technique you were going to use, whatever the cost was supposed to be — find another way. Please."
He had not planned to say please. It came out anyway.
Minato's expression did something complicated. He reached out and put his hand on Kenji's shoulder — a firm, steady weight. "I have been working on an alternative sealing method for six months," he said quietly. "Ever since you first told me you were preparing for something."
Kenji stared at him.
"You didn't think I noticed you studying sealing theory every time you thought I wasn't looking?" Minato's mouth curved slightly. "You're my son, Kenji. I notice."
The night came.
It came the way Kenji's memory said it would — fast and wrong, the village's chakra atmosphere shifting before the first alarm sounded, something massive and ancient pressing against the boundaries of its container. Kenji was awake. He had not slept. He was dressed and had his inventory checked and rechecked and the chakra suppression tag removed so he was operating at full signature.
He moved through the house to Naruto's room.
His brother was awake — he was always awake when he shouldn't be — sitting up in his crib with wide alert eyes, small hands gripping the rail. The Nine-Tails' chakra was already bleeding through in tiny increments, warming the air around him in a way that Kenji's chakra sense registered as a deep subsonic hum.
Kenji picked him up.
"I've got you," he said. "Stay with me."
Naruto looked at him with those blue eyes that somehow always seemed to understand more than they should, and made a small sound that Kenji chose to interpret as acknowledged.
He moved toward the back of the house as the first explosion hit the northern wall of Konoha.
He found Minato and Kushina forty minutes later, at the coordinates Minato had specified in their preparation meeting. They were in a clearing outside the village perimeter — Kushina weakened but conscious, the Nine-Tails' chakra chain visible around her wrists, Minato in the space between her and a masked figure in a white swirl pattern that made Kenji's jaw tighten.
He arrived as Minato was maneuvering for position, using the Yellow Flash movement that Kenji's system couldn't track and human eyes couldn't follow. The masked man — Obito, even if he didn't know it yet — was phasing through each attack with the casual arrogance of someone who believed themselves untouchable.
Kenji assessed the situation in two seconds and acted.
He pulled the one item from his inventory that he had been saving for exactly this moment:
[ITEM: Dimensional Disruption Tag — Creates localized interference with space-time techniques for 8 seconds. Single use.]
Purchased at: 800 SP — His entire savings at the time.
He had bought it two months ago and told no one.
He activated it and threw it at the masked man's feet.
The effect was immediate — Obito's phase stuttered, the seamless transition between solid and intangible fracturing into something jerky and inconsistent. For eight seconds, he was hittable.
Minato didn't need to be told twice.
The Yellow Flash moved, and Obito took a hit that sent him backward fifty feet through two trees.
It didn't finish him. Obito was not finished by one hit. But he retreated — regrouped — and in the gap that created, Minato reached Kushina, and the alternative sealing sequence began.
Kenji stood at the edge of the clearing with Naruto on his back and watched his father work and felt something he hadn't felt since the moment he arrived in this world:
Hope. Real, unguarded, terrifying hope.
The sealing took forty minutes. When it was done, Naruto was crying — the real kind, not the tactical kind — and Kushina was on the ground with her head in Minato's lap, pale and exhausted and alive.
Alive.
The system notification arrived so quietly it almost felt respectful:
[TIMELINE EVENT ALTERED: KUSHINA UZUMAKI SURVIVES]
EXP Gained: 2,000
LEVEL UP — Level 5 → Level 8
SP Gained: 500
New Quest Available: Protect What You've Changed
[WARNING: Altered timelines produce unpredictable variables. Remain vigilant, Host.]
Kenji read the warning twice.
Then he looked at his mother — breathing, living, her red hair spread across the grass and her hand resting over her heart — and decided that unpredictable variables were a problem for tomorrow.
Tonight, he had won something that mattered.
He sat down on the ground beside Naruto, pulled his brother close, and for the first time in either of his lives, let himself cry without trying to stop it.
Nobody saw.
Or if Minato saw, he had the grace to say nothing about it.
End of Chapter 6