Disclaimer: I do not own One Piece or Naruto credits goes to Eiichiro Oda and Masashi Kishimoto respectively.
After not finding kushina, he give up and head to home.
Near his home, Ren saw a girl with red hair standing infront of his house, seemingly waiting for him.
"Kushina-chan, why are you standing there?" Ren look puzzled at Kushina.
"Ren?" Kushina look at Ren with worried expression.
"Why are you reckless?"
"Why'd you agree that guy is Jonin, you know!!"
"Why you always make me worry?"
•••
Hearing her Ultimate Barrage Question Jutsu, Ren smile at her and said: "Calm down Kushina-chan."
"How can i calm down when your opponent is Jonin and you are going to fight that said Jonin in a life and death match!!" Kushina said while shaking Ren's shoulder.
"I can defeat him so you don't have to wor-"
"Can you be serious for once?!"
Ren's word was cut short by Kushina's scream. Startled, Ren look at her and notice a tears on her beautiful eyes.
He sigh and hug her, Kushina hug back and cry even more. He was really thankful to whatever god's up there for giving him such a good friend and awesome devil fruit.
'You will pay with your life Uchiha Kei for making my Kushina-chan cry.' Ren directly shift the blame to Kei without a shame.
•••
"Kushina-chan i promise you i won't die and defeat that Uchiha Kei!!" Ren said seriously at Kushina after she calm down.
"Pinky swear?"
"Pinky swear!"
With that, Kushina give Ren the most beautiful smile he'd ever seen. Ren then escort Kushina to her home. Then flash away and appeared to where he usually train.
As Ren didn't borrow money to buy another sets of weights as Kushina was not in a mood, Ren plan to seriously train his power for 3 months.
Using the tree around him as a target, Ren straighten his arm and point his palm at the trees.
PEW! PEW!
Suddenly, a ball of light, the sizes of golf ball materialized on both of his palm and flew rapidly at a tree.
BOOM! BOOM!
Ren continue firing Light Blast until he was satisfied, then Ren do try another technique.
Ren push his right arm up, Then Ren focuses his Light on his palm, which is held above his head, and projects it outwards into a flat circular shape reminiscent of a sharp disc spinning fast on his palm.
Ren look up for a moment to appreciate the beauty of this dangerous attack, however when he was about to throw it away, the light shaped disc on his palm suddenly had a crack then crumble and turn into light particles that flew back to his palm right after.
Ren was disappointed but never give up.
Failed...
Failed...
Failed...
"Finally i dit it!" Ren said excited about his success. He look up at the disk spinning on his palm, which he help up for 5 minutes or so already and not crumbling at all.
Although the disc is only small, the size of a house dinner plate, he was still satisfied. After all it only take him fifteen days to achieve this which means he still had a time to train another technique.
"Light Destructo Disc"
Ren took a deep breath, then trust his palm forward, throwing the disc towards the tress which cut them like a knife cutting butter.
Although creating this technique is slow but the speed of it when you throw it is ridiculously fast, no one can escape the speed of it unless of course they vanish while was still creating his Light Distructo Disc.
The disk continue flying when it arrive in front of a sturdy looking boulde, the disc manage to cut but not enough to split it in two.
Seemingly lost the ability to cut through things it explode turning the sturdy looking boulder into countless pebbles.
"Awesome, i can't wait to perfect this ability to the point that i can create anytime and anywhere just by raising my hand up and make it bigger and more powerful!!" Ren said while looking at the destruction of Light Destructo Disc do.
With that, Ren continue training new technique after technique. It's not that Ren posses an ability to master quickly, its just after learning a basic of that technique Ren would then switch to another technique.
His excuse is that all technique wether its a basic or not is useful in battles.
•••
Three months have passed and Ren was satisfied, In this three months Ren manage to replicate an ultimate move from a certain saiyan prince that perfectly fitted his Light ability, which has the same color as his Light as the original and a fitting name, Final Flash.
The fight between him and Kei is about to begin, so after training Ren rest for couple of minutes then flash away to his home. He clean himself and eat then walk towards the stadium where he would fight Kei.
•••
"So Minato, where is the kid that defeated you?"
Ask by a tall and well-built man with fair skin. He had, spiky white hair that ties back into a pony tail, with two bangs framing his face. There were red lines under his eyes.
"He's not here yet i guess" Minato replied while look around the stadium with full of people.
"Hey Jiraiya-sensei, why the Uchiha do it publicly instead of privately? Won't people mock them for bullying a kid?" Minato with puzzel expression.
"It's a message!"
"A message??" Minato look at his teacher.
"Basically means "Who ever you are, be it a kid or not, if you offend us you will pay." Well even if they not do it like this they can still kill that kid through assassination." Said by a woman voice startling both Minato and Jiraiya.
"Tsunade, what are you doing here?" Jiraiya ask while blushing
"Ah, Senju-sama" Minato said in polite tone.
"Hahaha, i heard there's a betting in this match so i came to bet that Uchiha would win. Hehehe... This this time i will win for sure!!" Tsunade said while slapping Jiraiya's back.
'Hold on... If Tsunade is betting on that Uchiha Kei... That would mean the kid who defeat my student Kaito Ren would win?? Impossible!! But if that Uchiha win then some bad thing would happen like Uchiha declaring a war to the Konoha or something... After the fight if the kid win then there's no need to report it but if the Uchiha win...' Jiraiya's thought while sweating.
"Ara, it seems like I'm not late" a creepy voice interrupt Jiraiya's dark thought and Tsunade musing to her win.
"Why are you here?" Jiraiya ask with guarded expression while Tsunade look at the new comer with curiosity.
"Hehe I'm just interested on Kaito Ren Bloodline Limit so i came to witness it before he die" Orochimaru said with creepy voice.
•••
While the future Sannin was chatting up, Ren was about to enter at the stadium when he saw Kushina standing at the entrance.
"Ren, do you remember our pinky swear?" Kushina said when Ren walk towards her and greet her.
"Yes of course, Kushina-chan"
"If you lose and ended up dying, breaking our pinky swear, I'm going to kill you!!" Kushina said with determination making Ren laugh at her.
"How would you kill me if i am already dead?" Ren was amused at Kushina childishness.
"The Uzumaki can summon a dead person so if you die in this Mikoto-sama promise teach me how to summon a dead person." Kushina said with a proud expression making her already cute face even more.
Kushina then walk towards her seat, leaving a speechless Ren who completely forgot that it's the Uzumaki are the one who created The Reaper Death Seal.
After a while, Ren came back to his senses then shook his head at Kushina ingeniousness and walk towards the stage.
"Ah, Ren oh Ren, im glad you didn't hide or runaway." Said Kei sighing in relief, then add: "Don't worry, im just going to torture you then after tiring my self, im going to cut your body into pieces then cook it and feed to a stray dogs and cats" Kei gently explain while having a happy face like today is his birthday and Ren dead body is his gift.
"Psycho"
"Horrible, how can he say that despicable things to a child while having that expression??"
"How disgusting"
The audience angrily said after all in their opinion no sensible person would challenge a kid to life and death duel.
The audience angry comment made the Uchiha who had come to earn money through betting, frown at the audience ignorance about how cruel the world is and at Kei crazy antics.
Ren look at his crazy opponent who look even more happy at the audience "Praise".
"Begin"
The fight then start at the announcement.
••••••
A/N: I want to give Ren a flashy entrance like Kiziru did when he attack whitebeard with Yasakani no Magatama at the marineford war but if i do that then Tsunade, Jiraiya and Orochimaru probably won't happened