Disclaimer: I do not own, Naruto, Bleach or any of the characters in this story.

Prologue: Birth of a revolution

Under the cover of night in the Seireitei, a new soul was born. Within the barracks of Fourth Division of the Gotei 13, Kushina Uzumaki gave birth to a son she named Naruto. Minato Namikaze was promptly handed his son by a Shinigami from Squad 4 and looked down upon him smiling, this was his son whom he loved unconditionally. Naruto was born of two Lieutenants, resulting in a large amount of Spirit Energy which Minato sensed from the moment he held his newborn son. The Yellow Flash of the Soul Society allowed himself a smile before handing his son to Kushina, who was clearly close to tears upon seeing Naruto. Kushina took her baby and pressed her lips to his forehead, whispering in his ear.
"Hello, Naruto, my child." She knew the words were simple but she was satisfied nevertheless. After all, she'd have all the time in the world to express her love for her son...or so she thought. Almost immediately things went wrong. The walls shook and everybody looked around in a panic, except for Kushina and Minato. Granted, they were more trained than anybody else in the room, but their unnaturally fast reactions came from their need to protect their son. Kushina held Naruto tightly, worried that he'd disappear if she let him go. Minato's reaction was also in the nature of protection, his hand went straight to the hilt of his Zanpakutō. He looked over to Kushina, not flashing that reassuring and confident smile he usually would before he left her, and disappeared out of the room with a Shunpo, at a speed that impressed all in the room but Kushina, who cradled Naruto like the newborn he was.

Minato kept his hand on his Zanpakutō as he moved at the phenomenal speed only he was capable of. His grip only tightened once he got outside. He stopped after he'd left the courtyard of the Squad 4 barracks. It didn't take him long to see the smoke coming from Sōkyoku Hill. He looked behind him and saw Shinigami going about their regular business, which confused him for a small while. After realising that nobody around him could see the smoke that was quickly fading, Minato headed for Sōkyoku Hill. A million thoughts raced through his head, trying to figure out what was going on. When he arrived atop the hill Minato couldn't have been more shocked at what he saw. A single man. A hundred bodies. A single smirk that mocked all the dead. The man he was looking at was none other than Sōsuke Aizen. Fresh out of captivity in Muken, the 8th and lowest level of the underground prison. The Hōgyoku pulsed within Aizen's chest and Kyōka Suigetsu shined under the light of the fool moon.

Aizen looked at Minato, his smirk only growing wider as he spoke.
"Reinforcements already? My my, the Gotei 13 has gotten stronger in the last five thousand years." Minato kept his vision locked on Aizen, he knew that if he revealed his thoughts then this battle was already over. Minato couldn't sense Aizen's Spirit Energy, he was of too high a class. drew his Zanpakutō ever so slowly as he thought. He'd heard quite a lot about Aizen, including his genius intellect. He also knew that this was too soon for Aizen to be out of Muken. This didn't take long to figure out. The end of the sword was close to freedom from his scabbard, he didn't have much time before it would be clear he was planning. He needed Aizen to think he was acting out of emotion, out of anger, then maybe he'd be in with a shot. The next thought that raced through his head was who had let Aizen out, and wether or not that person was here. Was Aizen talking to himself a moment ago? Was he talking to Minato himself? Or was he talking to a third party? Minato kept himself on guard. His Shikai would be unknown to Aizen, unless whoever let him out had mentioned it to Aizen, but why would they? Given Minato's level of power he presumed that if a third party was around they would tell Aizen promptly about his Shikai. Minato's sword slipped out of his scabbard and he pointed it towards his opponent, he was out of time and had no plan. All he had been able to determine was that there may be a third person in the area.
"It would seem as though you have the potential to be a worthy opponent for me." Sōsuke commented, wanting his opponent to feel as though he had some hope.

Minato stayed quiet, but glared at Aizen with a fiercer look than before, figuring he could buy a few seconds if he seemed too angry to talk. He abandoned the tactic after a few seconds, he had a minor plan. It was time to release his Shikai, he had no time to waste. Aizen had been locked up for five thousand years, his combat skills may be sloppy and he'd have no knowledge of the newer Kidō, the Kidō invented after his arrest. The elemental Kidō. This was Minato's plan. Minato didn't excel at the elemental Kidō, in fact he didn't even know how to use any of the five Kidō natures that the Kidō Corps had invented over the last thousand years. However, these new Kidō natures had let him understand the makings of Kidō, and he'd invented his own. It was the only tactic he could use.
"Godspeed, Furasshu." Minato's sword shrank, turning into a small and unique kunai knife with three blades and markings on the handle. Minato held his transformed Zanpakutō in his right hand and held out his left, gathering his Spirit Energy and forming a small, blue ball out of it. Aizen looked somewhat impressed.
"I was told that the new Kidō were that of the elements, but that move of yours is not elemental." Minato didn't need to reply, it was clear in his mind that Aizen was trying to trick him somehow with his words, so he steered clear of conversation. Another thing was also clear to Minato: Aizen wanted him to think that somebody else was nearby. He subtly implied a third person was close with his earlier comment, directing it as if not to Minato, and now he openly implied that he had been helped to escape and had been informed about any major changes to the ways of the Shinigami.

The time to attack was now. Minato threw his small Zanpakutō towards his overwhelming opponent who held up his hand, letting the kunai bounce off as if it had hit a wall of steel. The Yellow Flash of the Seireitei was shocked but he didn't show it in the slightest. His Captain, Soi Fon, would scold him for doing. Besides, it didn't matter how strong Aizen's hands were or how much Spirit Energy they were reinforced with. Aizen's hand wasn't his true target. As his kunai span through the air towards the floor Minato disappeared, moving at a speed that was no slower than instantaneous. He reappeared a the exact same moment that he had disappeared, a speed that no Shunpo could or would ever be able to match. A speed that even Aizen could not match. Minato reappeared with his hand around his kunai Zanpakutō and his other hand outstretched, shoving the blue ball into Aizen's chest, right against the Hōgyoku as he shouted his attack's name.
"Rasengan!" Minato landed on the floor and jumped backwards, flipping backwards in the air before landing, no longer physically able to hide his disbelief at this man's strength. Aizen hadn't even moved an inch backwards from the Rasengan.
"So that is the name of that move. It certainly differs from the names of traditional Kidō." Aizen's words hardly reached Minato's ears, he was forming an escape plan. Deep inside, beyond any level of emotion that he would give any recognition, Aizen was unhappy that he was unheard, which led to his next mood.
"Let me show you then." He spoke, and this time Minato heard. Minato ran towards his opponent, holding his kunai over his shoulder to ready himself for a swing. Aizen swung his hand upwards as he spoke.
"Hadō number 90. Kurohitsugi." Minato knew he was in trouble. Black walls began to surround him. He dropped his kunai and, as the walls closed around him, he teleported to it outside of the black coffin.

He looked to Aizen, whose smirk reappeared. Minato realised too late that he was in trouble. A Rasengan formed in his hand empty. He stood up, beginning to turn as he felt sharp teeth sinking into his neck. He thrust his hand out as he spun, hitting the humanoid Hollow that bit him in the chest. As it flew back Minato swung his kunai upwards with phenomenal speed and cutting the Hollow's mask. The Hollow disintegrated before it could fly off Sōkyoku Hill, being purged of it's misdeeds and being sent to the Soul Society outside the Seireitei, free to continue it's cycle. The Yellow Flash found himself panting heavily and falling onto one knee. He looked up at Aizen, speaking through gritted teeth in segments.
"What did...that thing do...to me?" Aizen smirked, although he had never stopped smirking since the fight began.
"That was a prototype of my associate. A failure, of course." Minato felt anger rising at that comment, but knew he couldn't stop Aizen even without this wound. He had to survive...for his son. And that meant he had to hear Aizen, no matter wether he could straight to the point or condescended his allies.
"To put it in a word..." A small pause. "Hollowification. Unfortunately, you won't live through it. Goodbye, Minato Namikaze."

Aizen turned away and began walking, leaving Minato a few seconds to wonder how Aizen knew his name before he hit the floor. He awoke a few minutes later, his fiancé, Kushina, at his side and shaking him roughly, trying to wake him up. He noticed a few blurs running towards him and small green glows. These were the members of Squad 4 trying to heal him. He knew it was useless and one look into his eyes told Kushina the same thing. Kushina didn't shed a tear, which worried Minato more than any amount of tears could make him feel guilty. It meant she had a plan.
"Don't...sacrifice...yourself..." Minato spoke slowly as Kushina shooed away the members of Squad 4, taking Naruto from one of them before they left. She drew her own Zanpakutō, putting Naruto on the ground beside her fiancé. Minato tried to think, but his mind was failing him, he could barely remember his own name.
"Suck them dry, Kyuuketsuki." The hilt of Kushina's sword remained as the blade changed into chains. The chains extended into Minato's soul. The chains hurt, or they should've done, but he was too weak to feel any such pain. The chains of Kyuuketsuki glowed as Kushina absorbed Minato's Spirit Energy with her Shikai. She was no medic, but this was her only plan, the only way to save the man she loved.

For a few seconds Kushina stood, absorbing Minato's power until there was barely any left, just enough to let him keep his life. Among the energy she absorbed was the Hollow's Reiryoku, Minato would probably feel weak for a few hours but he'd ultimately live and recover as normal, possibly faster if he were healed by a member of Squad 4. However, Kushina was now the host of the Hollow's energy, her body weakening fast. Kyuuketsuki has weakened the Hollow's power as it's energy was absorbed, as a Shinigami's Zanpakutō was meant to destroy Hollow's, not store their energy. In a few hours that energy would be transferred into Spirit Energy for Kushina to use safely, but she knew she'd hollify before then if something wasn't done. She couldn't weaken the energy any quicker without transferring it again, and Minato was too weak to take that energy back and have it drained from him again. He would not survive. Kushina hated what she had to do, but she trusted her son. Her son was strong, she could see it in Naruto's eyes. Those young, innocent eyes...those eyes that made her feel so guilty about what she was doing. Before she could change her mind, the chain of Kyuuketsuki from Minato disappeared and another stretched out and into Naruto. Kushina transferred her own power along with the Hollow's Reiryoku.

Naruto giggled every few seconds, as though he found the transference of this power ticklish. It didn't take long for Kushina to exhaust most of her power this way, she wasn't meant to give away power with Kyuuketsuki, it was a Zanpakutō meant to drain quickly, and she felt the effects of it. She collapsed onto the floor within twenty seconds, still conscious but weak. She sat there, on Sōkyoku Hill for about an hour, but she'd lost track of the time almost immediately. She cradled Naruto, apologising softly to begin with and then just holding him in silence. Eventually, word of Sōsuke's appearance got out and two new characters made their way up Sōkyoku Hill. These men were the Captain Commander, the Captain of the First Division of the Gotei 13 and his Lieutenant. Namely, Hiruzen Sarutobi and his second-in-command Danzō Shimura. Minato had woken up minutes before the two arrived and sat in silence with his fiancé. The Captain Commander had many questions when he reached the top of the hill, but none of them would be as revealing as the one he asked first. Deciding to leave the Aizen talk to later, his first question came.
"Whose child is that?" Minato and Kushina looked at the Captain in unison.
"This is Naruto...our son." Minato replied, certain that Hiruzen knew this.
"Kushina was never pregnant." Danzō spoke sternly, not attempting to spare anybody's feelings.

A cocky chuckle rang through the air, breaking the silence, as Aizen reappeared, removing his cloak that shielded his appearance, the same one he'd taken from Kisuke Urahara. Also releasing the Kidō hiding him from sight.
"That would be my doing. However, you wouldn't remember that. My doing also." Aizen held up his Zanpakutō, attracting Minato and Kushina's attention to it. His laugh rang out once more through the chilly night air.
"I would be interested to see how your son fares with that curse of his that you have put upon him...and without parents. Say goodbye to your son." Aizen turned away, looking back with the same smirk as always. "Shatter, Kyōka Suigetsu..."

Thanks for reading. I hope you enjoyed the prologue and there'll be a new update soon which I hope you'll enjoy just as much.