"What do you want to do?" Renjiro asked with a confused look on his face.
"Didn't I say it already? I want to test the integrity of your barrier," Kushina repeated.
"Why?"
"Renjiro, if you are ever in a position where you have to use such a barrier, then that means you need to protect something from someone. The barrier needs to be strong enough for you to meet your goals."
"Okay," Renjiro relented, "Then how are you going to test it?"
"By attacking it of course, how else would I test its integrity?"
"No," Renjiro shook his head.
'There is no way that I am going to let her attack it. It won't even be a fair fight. She has more chakra and more experience in Barrier ninjutsu one me.' Renjiro thought.
Kushina just stood there in silence glaring at the young redhead.
"What? You have more chakra than me and even more experience in Barrier ninjutsu. You might notice some vulnerabilities quicker than I even erect the barrier."
Kushina contemplated for a minute before saying, "You make some strong points, so I will limit myself to only three attacks."
"That still doesn't make any diff-" Renjiro began before he was interrupted.
"I will only use my Chakra Seinou," Kushina said as she smirked.
'She really isn't going to let this go, is she?'
"Fine," Renjiro said as he made new seals and placed them closer to him this time. He accepted the challenge with a pinch of trepidation.
"Wait," Kushian said before taking what looked like a pill from the pouch on her belt and handing it to Renjiro.
"Are you really giving me a soldier pill?" He asked as he studied the dark round pill.
"Yes, I know the normal one doesn't really do much for you but this one is different. I don't want you to start using the fact that you have been using your chakra reserves to master the barrier as an excuse."
'Is she kidding me?'
Renjiro's eyes twitched at the plain taunt but nevertheless, he took the pill. Seconds after, he was assaulted by its revitalizing effects. True to Kushina's words, the pill enabled Renjiro to replenish most of his chakra.
He then focused his chakra and bent to touch the central seal and after a hand sign, the blueish barrier materialized all around him.
"Are you ready?" Kushina Inquired.
Renjiro was in no mood to talk and just gave her a nod.
'Prepare for the worst Renjiro.' Renjiro thought as he decided to use more than half his reserves to fortify the barrier.
As a result, the already fade blue barrier got a new sheen as it gradually got darker. He knew Kushina was going to win, but he wouldn't let her have an easier time.
After receiving the nod from Renjiro, Kushian took a deep breath before five adamantine chains manifested around her. Contrary to his expectation, the chains did not immediately attack Renjiro's barrier but just swirled around Kushina.
'What is she planning?'
Renjiro thought. The fact that Kushina did not attack immediately nerved him.
All of a sudden, Kushina's chains lashed out at Renjiro with lightning speed, their razor-sharp edges slicing through the air with deadly precision.
'Shit-'
"Boom!"
The first chain struck the barrier with a resounding impact, sending ripples cascading across its surface.
'I knew the chains were this strong, but even using the word strong was an Understatement.'
Renjiro thought as some cracks in the barrier caught his attention. it was clear they were a result of the collision. He channelled more chakra into the barrier, returning it to its previous condition.
"Ho, ho. It looks like you have really mastered this barrier Ninjutsu. I now have two more tries," Kushina said as the chains retracted to a couple of metres above her head.
As Kushina finished her statement, the chain congregated in one place before...
"What the hell?" Renjiro could not help but blurt out loud.
The chains above Kushina's head were spinning at a rapid speed. They were even affecting the air around them and creating a vortex. with their crimson sheen, it looked more like a red vortex was forming above Kushina.
Without any signal, the chains lashed at Renjiro for the second time. But this time, Renjiro was prepared.
Using his Sharingan, he realized the trajectory of the spinning chains and used more of his already dwindling chakra to reinforce the point where the chains would meet the barrier.
Things would be perfect, right?
Unfortunately for Renjiro, the chains separate at the last minute, hitting the barrier at five different points!
"Shatter!!!"
The barrier shattered like glass and fell down to the ground. The only piece of the barrier that was left standing was the around right in front of the bending chunin.
Renjiro was standing there clenching his teeth.
'Did she know that I knew what her plan was?'
"That was good Renjiro," Kushina began as she clapped her hands, "You already got the point without even me having to teach you a lesson."
"Huh?" Renjiro was confused.
"Sustaining barriers is one of the easiest things to do," Kushina stated.
Renjiro was still not getting her point. Noticing the look on his face, Kushina added, "What you did before the second attack is the best way to sustain a barrier. You only need to give it enough chakra for it to run then focus on reinforcing the points where the attacks would land, hence minimizing the amount of chakra you need when defending."
The realization hit Renjiro changing his facial expression before he remarked, "But in the end, you still saw through that and attacked at separate points."
"You need to be fast enough to act against that. If you continue working on your reflexes, then this will become second nature to you," Kushina stated.
'She's right. Being fast enough to do this might give off an impression of near-endless chakra to the enemy. Once they suspect that, or even believe it, then it would make things easier for me.'
"Wait, you just said that I got the point before you had to teach me a lesson. This wasn't a lesson?" Renjiro questioned.
"..."
"..."
"Anyway speaking of lessons, I think it is safe to say that you have mastered the basics of Barrier Ninjutsu or you are close to doing so," Kushian quickly changed the subject.
Renjiro just glared at her with annoyance.
"So we can now begin with Yin and Yang release," Kushina said before turning to Renjiro and asking "How much do you know about Yin and Yang Release?"
Renjiro shook his head and said, "Not enough to speak on it."
"..."
"What?" Renjiro asked since Kushina was giving him a weird questioning look.
"Didn't I tell you to look it up more than a week ago?" She questioned.
"I was busy," Renjiro stated.
Kushina kept giving him the same questioning look that prompted him to answer. It was as if she was asking what he meant when he said he was busy.
"Between my shift at the prisons, training with the squad and learning Barrier Ninjutsu, I didn't get time for it."
Accepting the reply, Kushina asked. "Do you want me to explain the whole concept, or should I just show."
This question was music to Renjiro's ears. He grinned before answering.
=====
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