This idea came to me today while I was thinking about two IciOri fics I read, the general idea for this story comes from them.
Bleach: The Last Chapter
Los Noches is the center of the dark realm. It is where all Hollows bow. It is on the other side of Soul Society. The opposite of our world. The world of Los Noches: Hueco Mundo.
Ichigo Kurosaki ran through the endless hallways. He was completely alone. He couldn't feel Rukia, or Chad. Uryu's reistu was fading, only Renji seemed to still be able to fight; but whether he was winning, Ichigo couldn't know.
Finally he stepped into an enormous room; it was more like a cathedral than a throne room. It's ceiling was out of sight, and he could have spent a half- hour walking to the throne itself, fortunately he had shunpo for that.
In a heart beat he was in front of the throne itself. It was empty.
'This is unbelievable, after everything I went through to get here and he doesn't even have the decency to show up!'
"Aizen!!!!!! Come out and face me!!" Ichigo roared to the room.
He stood there for several heartbeats, unmoving. Then he heard the approaching footsteps of the man he wanted to kill.
"My my you are one rude guest, you know that?" said Sosuke Aizen from the side of the elevated throne. He walked into Ichigo's view his unsheathed Zanpuku-to in one hand, the other holding a long thick chain...
"A proper guest would kindly thank his host for allowing him into his domain."
"Don't fuck with me Aizen!! Give me Inoue now!"
"Inoue?" Aizen mock- asked, "Inoue, oh you mean Orohime Inoue don't you?" He gave the chain in his hand a small tug and Orohime Inoue fell into view, her hands were bound behind her back, and the chain was attached to a metal collar on her neck.
"You bastard, how dare you treat her like that?! I'm going to mutilate you!!!"
"Just try it, boy."
"Bankai!"
Ichigo summoned all of his power into Zangetsu and in a great flash it turned into a black daito with a manji cross-guard. "Tensa Zangetsu"
"Back in soul-society you defeated me effortlessly, but I was weaker then, tired, and bloodied from my fight with Bykuya, but I've become even stronger since then; this time I WILL WIN!!!!!!!!!"
Suddenly he was behind Aizen, the tip of Zangetsu pointed at the back of Aizen's neck.
Aizen simply smirked, "I couldn't follow you, your shunpo in bankai form is even faster than that of normal ones."
"Actually I've never used Shunpo in bankai form. I've just jumped or run and I've gone as fast as I needed to."
"That's actually quite impressive, boy-san."
"Release Inoue and I might spare you some of the pain."
"Don't get full of yourself!" Aizen swung his Zanpuku-to at Ickigo, but Ichigo dodged and counted but Zangetsu went right through Aizen and he disappeared.
"An Allusion!"
Quickly he jumped high into the air and managed to dodge Aizen's counter-attack.
"Shatter Kyoka Suigetsu!"
"Tensa Zangetsu!"
The Guardian and the Traitor banged away at each other furiously in what seemed to be a stalemate.
Meanwhile, Orohime who had fallen to the floor when Aizen had released her began trying to untie herself, first she managed to slip her legs through her bound wrists so that they were in front of her just as Tatsuki had shown her. Then she began biting away at the knots.
With another clang Aizen and Ichigo landed on the throne room floor. Neither showing any sign of tiredness.
"Time to put an end to this nonsense! All Creation be undone! The ruler cast down and the fallen rise to glory! No peace for any who look upon the destruction of all; Metsubou Souzoubutsu level 100!"
Out from Aizen's out stretched hand came a black cloud so deep that the darkness inside could have been from the very bottom of the deepest ocean. It expanded and surrounded Ichigo. It enclosed over his head, and compressed itself down upon him all the way to the floor. No one good have survived it.
"The most powerful destructive kido. It is a one shot kill in any case that it is used. There is no way he could have out run it, even if he had tried."
"Oh ye of little faith." Said Ichigo from behind Aizen.
"What!? How can you be alive?"
"Shunpo." Ichigo said simply.
"That is not possible."
"You wanna bet?" said Ichigo from in front of Aizen.
Orohime finally managed to bite through the last knot. She got up and ran for the edge of the throne platform. But just as she got to the steps she saw something that would haunt her for the rest of her life: Ichigo with Aizen's sword sticking out of his gut. She didn't know how it happened, she had not seen the blow. But het eyes were not wrong, Aizen had not called out his sword's name, so there was no illusion in place... her Ichigo was really dying.
"NOOO!!! Damn you Aizen! Tsubaki! Koten Zanshun ! I reject!!"
"All right some action!" yelled the Shun Shun Rika as he blasted toward Aizen. Aizen caught completely off guard only managed to deflect Tsubaki, but it left him completely wide open to his real opponent, before Aizen knew what had happened; Tensa Zangetsu had pierced his black heart and come out the back of his shoulder. It had taken all of Ichigo's remaining strength, now he fell back with a quite thump.
"Shit." said Aizen. "I would've had you too if I'd used my bankai instead of kido. I could have undone reality, but I underestimated your resolve." With that, Aizen Sosuke died.
"Kurosaki-kun!"
Orohime ran to Ichigo's side, "Don't worry! I can heal you! Don't leave me!"
Ichigo opened his eyes one more time, he looked into the young woman's beautiful face for a moment. "Oro... hime."
He said quietly, and passed on. A few feet away, Tensa Zangetsu disappeared along with Ichigo's Reitsu, and Ichigo's shuhaksho turned pure white.
"NOOO!!!" Orohime wept, "wait a second, Ayame, Shuno, Koten Kisshun, I reject!"
Ayame and Shuno zoomed out from Orohime's hairpin's and formed the half oval of healing energy over Ichigo's body.
But after a moment the oval dispersed and Ayame hovered towards Orohime, "I'm so sorry Orohime, Kurosaki-kun was forced to die to reclaim his Shinigami powers before."
"So? You can bring back the dead! You've done it before!"
"I'm sorry, through we can restore the dead, it can only be done once per person, and Kurosaki-kun all ready used up his limit for the technique before he had even heard about it. I'm afraid he's gone for good this time."
"You can go back Ayame, Shuno, and you too Tsubaki."
In a flash, Ayame, and Shuno disappeared, for a moment Tsubaki looked at Orohime, for the first and last time he wept for his master, then he too disappeared.
Orohime leaned over Ichigo's face, it looked so peaceful now, she smoothed back his hair.
She began to weep openly now, "I'm sorry, Ichigo... my... my love... my only love... I failed you again."