This is a Bleach fanfiction story that I am teaming up with Openminded15 (from fanfiction.net) to write. We do not own anything associated with the Bleach series and/or its characters. However this story is an original idea as some of the characters may seem a bit OC so don't judge. Warnings as this story will be rated M due to the graphic nature, language, nudity, sexual preference (Yaio/boyxboy love). Please don't read if you aren't into these kind of things. Also please leave your comments and reviews telling us what you think. Thank you!

Key guide: bold - hollow voice, italic - zanpakuto voice, *mental speech*, "regular speech", 'thinking', bold italics - attacks, (author notes/translations), ~time skip~

Four- learning control

Ichigo slowly began to awake when he felt someone moaning, thrashing, and whimpering right next to him. Ichigo could feel fear coming from this person. Ichigo recognized it almost instantly as it was coming from his hollow zanpakuto. Ichigo gently ran his hand through Shiro's white locks as he rubbed his hollow zanpakuto' back.
"It is alright Shiro. You are safe as no one is going to hurt you." Ichigo stated softly as he pulled his hollow zanpakuto into his lap after he sat up on the cot. Shiro's black and gold eyes fluttered open as he stared at Ichigo. He could feel a strong connection to the orange haired teen. After a couple of minutes Shiro pulled away from Ichigo as a light purple blush crossed his face.
"Sorry...." Shiro stated softly. Ichigo hated to admit this but he thought seeing this side to his zanpakuto was kind of attractive. It was strange to see this version of his zanpakuto as he wanted Shiro to suddenly attack him, laughing, and calling his king a fool. "So who are you and how do I know you?" Shiro asked. Ichigo let out a long deep sigh as he studied his hollow zanpakuto. Shiro tilted his head to one side as it looked like he was trying to piece things together.
"My name is Ichigo Kurosaki. We have known each other for a very long time as you used to be a part of me." Ichigo explained. Shiro tilted his head as he still looked confused. This caused Ichigo to sigh out loud as he didn't know how to explain it to his hollow zanpakuto without sounding like an idiot. A part of him mentally chuckled with the thought of Rukia and her crappy drawings. Suddenly laughter filled the room causing Shiro to jump hiding behind Ichigo. Ichigo turned his head to see Kisuke with the fan in front of his face.
"Well this is most definitely an interesting sight to see." stated Kisuke.
"Damn hat and clogs. Are you trying to give him a heart attack?" Ichigo snarled causing a bit of his power to lash out at Kisuke. Seeing the spark of Ichigo's powers flash out caused Kisuke to raise his eyebrows.
"They weren't kidding when they filled me into what happened. Can you restrain it?" Kisuke asked seriously as he closed the fan that he was holding. Ichigo took long deep breaths trying to restrain the power that was angrily lashing out. It seemed not to affect his hollow zanpakuto. After a while Ichigo managed to restrain the power.
"You already know how terrible I am with this kind of stuff. It got even harder after what Mayuri did to us." Ichigo snarled.
"Yes.... Unohana filled me in to what happened. I was about to head to his lab to see if I can find the chemical that did this to you. Don't worry as we will fix what happened. But in worst case scenario, I called in for some help to help train you to control your powers." Ichigo couldn't help to wonder who Kisuke recruited to help him with his training.

"Ichi?" Shiro questioned confused about what is going on. Kisuke rose his brows even more when he saw Ichigo's hollow zanpakuto behind the young teen.
"It's alright Shiro as this is a friend. He is hopefully going to help us." Ichigo stated. Shiro came out from hiding behind Ichigo as he looked at Kisuke.
"Shiro?" questioned Kisuke.
"It's short for Shirosaki. His full name is Shirosaki Ogichi." answered Ichigo.
"But isn't he your....?"
"Yes he is but because of what Mayuri did to us, he doesn't remember who and/or what he is." Ichigo stated bluntly. Kisuke nodded his head as he seemed to understand what Ichigo was thinking. Ichigo got off the cot followed by Shiro. "Let's get going. On the way you can possibly explain things better than I can." Ichigo stated as he walked up to Kisuke. Shiro followed timidly behind Ichigo as the three of them stepped out of Squad Four's barracks. Yorichi and Unohana where there along with Squad Two's captain Soi Fon. Shiro avoided eye contact with Soi Fon as it seemed that way the woman was ready to attack him. He couldn't understand what he did to her that made her this hostile towards him. 

"Where are we anyways?" Shiro asked.  He noticed how everyone was looking at him with such anger.  Shiro didn't like how they looked at him.  It made him feel as if he did something terrible.  Suddenly he could feel someone grab his hand.  He looked over to see Ichigo was holding his hand.  A light violet blush crossed his face as he kept his eyes down casted.  "Did I do something wrong?" he asked.  Kisuke looked at the hollow zanpakuto as he noticed him trembling despite Ichigo holding his hand and close to his body.
"Not at all Shiro.  It is simply because of what you are.  You are a hollow as Shinigami we are supposed to fight and kill your kind.  But since you are important to Ichigo, no one is allowed to harm you.  But that doesn't mean that people won't try.  Right now we are in a place known as the Seireitei.  It is the world where Shinigami reside." explained Kisuke.  Shiro looked at the Kisuke as he began to explain more about what Shiro truly is, the duty of the Shinigami, what hollows were, and everything else that he felt the hollow zanpakuto needed to know.  Shiro just nodded his head every now and then as a part of him felt that he already knew this.  Finally the group stood outside of Squad Twelve's barracks.  Shiro let out a blood curdling scream as he collapsed to the ground.
"No..... Please No......." Shiro cried out over and over again as his powers began to lash out as he shook in fear.  Ichigo was the first one to react as he grabbed Shiro pulling him up and holding him close to his body as he wrapped his arms around Shiro.
'A part of him still remembers what Mayuri did to us.' Ichigo thought to himself.  "Shiro it's all right.  I promise nothing is going to happen to you.  I am here to protect you.   Please calm down." Ichigo stated as he held Shiro close to his body.  Shiro began to relax in Ichigo's hold as his power began to tapper off.  Shiro whimpered into Ichigo's chest as he didn't like the feel of this place.  Somehow it had caused him great pain.  He didn't want to go through that again. 
"Ichigo is right Shiro.  But however I am going to need to take some data from you and Ichigo if I am to fix what had happened." Kisuke stated.  Shiro looked up at Kisuke as a part of him seemed as if he could trust the man.
"Kay." he stated softly as he let go of his hold on Ichigo. 

~Later on~

The group was heading towards some training grounds where Kisuke told them that he would meet up with them later on.  He was going to go over the data that Mayuri had kept on the experiment that he had performed on Ichigo.  He was going to use the data that he acquired on the two to hopefully reverse the changes that had happened to both Ichigo and Shiro.  Finally they approached the training grounds to find captain of Squad Eleven Kenpachi Zaraki and one of his subordinates Ikkaku Madarame waiting for them.  Seeing perhaps two of the men in all of the Seireitei whom love to fight caused Ichigo to let out a low moan. 
'Gods I hate my life.  But no doubt these two will help me learn to control and let loose these powers that are coursing through my body.' Ichigo thought to himself.
"Good to see you, Ichigo. Ready to train?" Ikkaku greeted.
"Yeah, let's just get this over with." Ichigo groaned. Even though they are the best at helping him, he would much rather have Renji or Yoruichi train him. These two tend to get out of control.

Ikkaku took the sheathed zanpakuto and removed its protective covering. He held onto the sheath in his left hand, while holding his zanpakuto in his right. He jumped towards Ichigo at an extremely fast rate. Surprisingly, Ichigo was able to dodge it completely. Ikkaku was hugely surprised by how much Ichigo's speed has increased without even releasing his shikai. With one flick of his wrist, Ichigo sent the bald shinigami flying through the air. He crashed into the side of a rock formation, creating a large dent in the side.
'Damn it. I had only meant to push him back a little bit, not throw him halfway across the Seireitei!' Ichigo thought to himself.  It was now Kenpachi's turn. He was eager to get a hold of Ichigo and see what his strength really is. Ichigo knew that Kenpachi would push him to his limit and that's what he's afraid of. Kenpachi just smiled as he charged back for Ichigo. Ichigo's powers only seemed to lash out violently without his meaning to. Kenpachi was able to block most of them, until one smacked him right in the jaw. It cute him deep, leaving a burn around the wound.

Ichigo continued his strong and fast attacks like that for a while. It was hard for Kenpachi to keep up. Kenpachi was starting to get annoyed that he couldn't get an edge on Ichigo. His strength used to be unmatched and strong as ever but, with Ichigo's powers being unleashed like this at once was making it tough. A powerful yellow riestu formed around Kenpachi's entire body as he removed his eye patch. The patch was given to him so that he could control his strong spiritual pressure. His zanpakuto grew much larger and bulkier. The large yellow rietsu built up on his blade. He waited until it grew a substantial amount and then launched it at Ichigo. It smacked right into Ichigo and sent him flying, dragging and digging him into the ground.
"King, no!" Shiro yelled out in agony. He couldn't watch this any longer. He feared Ichigo would get dangerously injured from that attack. A weird feeling built up inside of him, until he couldn't hold it any longer.

He rushed to Ichigo's side and began to release the energy. Shiro began to be surrounded by thick, black clouds of riestu. It enveloped his arm, and created a long, blade out of the smoky energy. He closed his eyes, not trying to aim, and swiped his blade downwards. Massive amounts of energy slashed down to the right of Kenpachi, managing to not cut from his shoulder on. Blood spurted from the impact wound. Ikkaku watched in absolute horror as a hollow version of Ichigo rushed into battle.
'I can't believe that the captain went down with one blow. That hollow's power seems even deadlier than Ichigo's.' Ikkaku thought to himself as he could see Shiro turn his attention towards him. This caused the bald Shinigami to spit out a sharp curse.

No one noticed that Ichigo had moved when he felt Shiro's reishi sky rocket. He had heard the hollow zanpakuto call him King. Even if Shiro didn't realize to the reason to why he called Ichigo, King. It kind of felt right to do so. Ichigo's hand wrapped around Shiro's wrist as he clutched the black energy like a sword. Ichigo recognized the attack to be Mugetsu (moonless sky) but, it seemed that Shiro managed to perform the attack even before he knew what he was doing.
"It's alright Shiro. They weren't going to hurt me. They were only testing my powers and what I have become capable of now that I have no restriction on my powers." stated Ichigo as he watched Shiro power down. Not only was Ichigo's powers completely unbound but it also seemed that so was Shiro's.