Konoh's Next God Of Shinobi

So it begins

A few weeks after the attack Kai sat on his bed still with an emotionless look on his face, he didn't want to talk to anyone and refused to leave his room. Kushina had to bring him food and sometimes force him to eat and when Hiruzen, Tsunade or anyone came to visit he didn't greet them.

Today on the other hand Hiruzen came to visit and decided it was time for Kai to stop being depressed at a young age and entered his room to see him sitting on a chair staring out of his window "Kai?" He asked but didn't receive an answer, Hiruzen sighed and pulled a stool to sit next to him "Look I know you're hurting but this isn't good for you, you need to be happy that's what your mother would have wanted not for you to sit in your room mourning her like this." He said but still didn't receive any response.

"You still have family Kai and they're worried about you. So please let them know you're alright." Hiruzen pleaded "Who did it?" Was Kai's response "Did what my boy?" "Who killed my mother?" Kai asked turning to Hiruzen, he dared not to lie to the boy since Kai already knew someone was controlling the kyuubi. Hiruzen let out another sigh before telling him "It was a rogue Uchiha that called himself Madara Uchiha." After Hiruzen said those words Kai's eyes had a dark glint to it and Hiruzen knew what that meant... revenge.

"I will get stronger and find this Madara Uchiha and make him pay for what he did." Kai vowed and even though it wasn't the way Hiruzen wanted to get Kai back to normal but it was a start "Jiji can you train me?" Now that was a question he was not expecting but nevertheless it put a smile on Hiruzen's old face, the boy had a goal and he would get stronger to see it to the end "It would be my pleasure to help you reach your goal." And there it was, a true genuine smile on Kai's face.

Said boy got off his chair and hugged the old hokage and then Hiruzen felt warm tears on his chest signifying that he is now getting all that emotion out "I miss her." Came Kai's muffled voice as he cried even more "I know Kai, I know."

Four months later

Hiruzen blocked a kick sent to his head by Kai and aimed a punch for his chest but Kai expertly dodged it and used the outstretched arm as a base to jump off of and sent a kick towards his sensei's head which the old man sidestepped. Kai had been training for the last four months and has grown exponentially, he was also set on going to the academy to become a ninja.

Hiruzen was more than impressed with his student, the boy seemed to be more of a genius than Orochimaru with nin and taijutsu by learning everything he threw at Kai and the only reasons they'd stop training was when Kai passed out due to chakra exhaustion, when it was time for lunch or if Kushina or Emiko Hiruzen's daughter in law stopped the two.

Kai was so good in fact that even Minato would help train him when he had time and it was mostly his speed. Minato would use the hiraishin by placing kunai all over the training ground and Kai had to locate him every time he teleported to a kunai, this helps increase his speed but of course Kai also added weights for an increase.

Minato even taught Kai the rasengan which he learned in record time of four days, even faster than himself and it took him two years.

After the training with Hiruzen Kai went to look for the only taijutsu master in Konoha after Emiko put an end to their intense training, he was always learning and growing he got the idea of wearing weights from the green beast and luckily not his fashion sense.

Kai then saw Kurenai and decided to ask her "Kurenai-san." Kai greeted making the chuunin smile "Kai there's really no need to call me so formally Kurenai is just fine." She said receiving a nod from the boy "Have you seen Might Gai?" He asked, Kurenai seemed to ponder for a minute before answering "Oh I remember, hokage-sama sent him on a mission about an hour ago, why?" She asked.

"I was wondering if he could train me in my taijutsu but I guess I'll head back home for the day." He answered "Okay but please be careful with your training, you're still young and could injure your body beyond repair." Kurenai practically scolded and Kai just nodded and went home.

When he got home he went to his room to prepare for a shower when he heard someone "So we finally meet." Said the person, their voice sounded aged just like the old man but more older than he was. Kai quickly turned around and saw an old man with grey spicky hair that reached to his waist, fang like bangs that reached his shoulders with one covering his right eye only leaving his left eye visible, he wore a black robe with black gloves.

"Who are you?" Kai asked trying to push chakra into the hiraishin seal on his back to call Minato but it wasn't working, in fact his whole chakra network felt like it was frozen "Trying to call for help I see but you can't." The man said as he walked closer to Kai "What did you do to me?" Kai asked with anger in his voice even though his held an impassive gaze.

"That does not matter boy but to answer your first question...I am Madara Uchiha, former clan head of the Uchiha clan and co founder of Konohagakure no sato." The man known as Madara said with authority and pride, Kai on the other hand ditched his impassive look and turned it into a glare "YOU KILLED MY MOTHER." Kai growled out those words with venom "Now why would I kill my own daughter." It wasn't a question but a statement.

When Kai heard those words he froze, it felt like his entire life had come crashing down on him, he was the grandson of the most powerful Uchiha in history and that same man was standing in front of him while he should be dead "It's true boy, even though I don't like the fact that you have that sad excuse for a doujutsu you are my grandson." Madara said as he pointed at Kai's left eye.

"I don't understand, how you should be dead." Kai said "I will explain later but now I will get you out of this village and train you." Madara ordered "Why?" Kai asked, even though he is his grandfather Kai isn't going to just up and leave without an explanation "You are too weak and I will not have a weak descendent, I will make sure you're strong enough for what is thrown at you and seeing as you learn quickly not much time will be spent on teaching you." Madara explained.

"But I can't just up and leave, people will start wondering where I am." Kai said "I will teach you how to create a blood clone, it will continue what you were doing." Madara said, he had everything figured out and it didn't seem like Kai had a choice in this, either do it willingly or Madara could just take him by force and leave a blood clone in his place and so the boy agreed.

Later: Unknown location

Kai and Madara arrived in a hideout where Kai met a plant like creature with half of it's body black and the other half white "Zetsu take him to his room, we shall begin your training tomorrow." Was all Madara said before walking away from the two, Zetsu did as he was ordered and left with Kai, training would be a true pain tomorrow.