Flashback! 

"Now, I just need to present them a scroll and test them whether they could come to work together," Sora say watching her students using her clones like a spying jutsu. 

"It is good that Jin came up with a solution for their lack of resources. That is perfect for information gathering but this approach is constrained due to certain factors. Well, it's time I guess" 

...

After Jin rushes back to their meeting place, he welcomes me with Kaze healing a cut from Mū. 

"You have been attacked?" He wondered then looked around. 

"Not a big problem, but I got some clue I don't know if it will lead to the information package" Mū replied while Kaze finished patching him up. 

"Me too, this is getting confusing" Kaze also replies. 

"That means we are simply thinking too much," Jin says while thinking hard. 

"From the beginning, Sensei just wanted us to chase a headless tail, separating us. But, as for the clues, Why don't we take the nearest clue and see?"

"Where is that?" Kaze asks. 

"From where I came, three meters there's a clue of the said resource" 

"We take that then." Jin immediately agreed. 

"Prepare yourself, If you know how to work together, and act upon contact with the enemy, I'll watch your backs," Jin says looking ahead. 

"I'll take the vanguard as stated, Kaze support me" 

"Mm" nodding her head, Kaze agreed. 

"Well, then let's roll" 

Swish! 

Ninja running and jumping on the trees, the trio were in formation. A single-file formation with Jin slightly deviates to the left and the right moving in a zigzag. 

"We're almost there," Kaze said, causing Jin to abruptly stop and send out his robe trapping the duo and pulling them back. 

"WHAT THE HELL!" Mū exclaims while Jin sighs. 

"We need proper plans, we need a decoy so, I will create an illusion while you two rush to the objective and run back. I'll try to buy us some time" 

After he says that, he vanishes creating two solid clones in front of him disguised as the duo. 

Mū being the decisive he is, rushes forward in a detour with Kaze following him. 

"There, you see that mound?" I saw a seal formation on it. 

"Good, you rush and grab the info, while I guard you" 

"Mm" 

...

Sora watches in amusement as the trio rushes toward her. 

"Mamama, What a tactic" She smiled in amusement and then looked at her back watching two teens trying to steal the info she guarded. 

Poof! 

A summoning cloud occurs as the real Sora arrives. 

"Ah, that was good. You can rest, Chika. I'll take it from here" 

Poof! 

Chika the disguised Sora flashed with the wind and was replaced with a chipmunk creature with a green pattern on its back. 

(See you later, Sora) 

Poof! 

Looking with interest, Sora suddenly vanished and decided to bring Jin toward the duo so that she could judge the level of their systematic teamwork. 

She knows the couple had good teamwork but Jin is a different case. 

In fact, this whole charade was to test her new student. What is their strong point what needs to be improved and what does she need to do to help them? 

That is what her teacher taught her when she was a genin. 

...

"From the report, The boys and even the girl had mastered their respective weapons. Luckily, Jin had the awareness to master at least one weapon. 

I just need to give them a few jutsu that are suitable for them while working on their teamwork. The rest can be earned with time" 

Smiling, she turns her head to Jin's location and disappears sending Jin flying who already reacts while defending himself from the sudden strikes. 

"What? You have an enviable Physique, my student!" Shock, she looks at her hand which shook due to the impact from Jin's skin. 

Looking up, one would see thirsty bloodshot eyes. 

"Let me see, what the extent of that physique can be of service to you!!" 

...

Jin. 

"Not good!" 

Boom! 

Rolling away, he felt a solid punch on his abs and luckily it did not hurt him much. 

He faces his teacher who seems in a trance of battle maniac. 

He watches her as she rushes toward him with a raised fist. 

"Let's do this!" 

Exclaiming, he abandons all his plans and fights with his all to save his sin. 

Bam! 

Bang! 

Bam! 

Crunch! 

Crack! 

Boom! 

Trees, grounds, and even the atmospheres were groaning under the pressure of their spar. 

Jin was covered in blood all over and just fighting on his will. 

Zing! 

Suddenly everything lost color as a bright light flashed separating the duo. 

When all is calm, a sword and kunai can be seen clashing and exchanging their blows. 

Sadly, the sword wielder is having a hard time against the kunai wielder. 

"Hahaha, forget about the objective I gave! Let's me see how you guys going to work together!" 

Sora had lost it, she laughed as she exchanged skills with her students when a whooshing sound came and a sickle came intending to slash her arms. 

Dang! 

With a stomp on the ground, Sora raises a fist made from the earth itself. 

Jin shook his head from his groggy state and rushed pulling out his chain-kunai. 

Like a live snake with venomous fangs, the chain-kunai came to life as Jin controlled it supporting Mū. 

Seeing this level of combat, Sora almost gets an orgasm during the fight, pretty much enjoying it. 

"Good, You already passed the requirements, but now try your best to survive me!" 

And then, everything went black. 

...

Present. 

Jin shakes his head to dispel the memory of his beating as he turns to look at his teacher, Sora. 

Sora smiled as she listened to Kaze's question about wind element/nature on how to utilize it using her medical jutsu. 

"Wind is formless, in fact, it has no form and it contains many components and one of them is, oxygen, which we survive from. So, use that component and try to come up with your version of an oxygen mask or something" 

"What about Lightning?" 

"Mm, it is a variant of wind but filled with static and particles. You can use it for CPR or something. Also, try to combine the two" 

"Thank you, teacher!" 

"What about you, my favorite punching bag?" Sora asks, looking at Jin. 

'Sigh, this woman is different from her name. What Sky? The sky is beautiful, but she..' 

Bang! 

Suddenly, Jin sent flying crashing against the trees. 

"It seems like you thinking bad things of me?" With a gloomy expression, Sora asks. 

"What's bad things?" Exclaimed, Jin stood up afraid of being beaten again. 

"I just thought of using Lightning as a homing missiles from the sky!" 

They had tested their chakra nature, and Kaze had wind, water, and lightning. Mū had Fire, Earth, and Yang. 

As for Jin, he only had lightning. 

But he didn't care, he could make do with them. 

He had many thoughts about how to use and utilize them. 

"That's good. Look at Mū his progress is more evident in his fire nature. He started to turn to earth now" 

"Kaze already mastered her water transformation chakra nature and works on the other two. As for you..tch, tch, tch" 

"Oi, listen here you..twig! I am on my way to surpass your lightning chakra level. I already created my lightning style complimenting my weapon! So don't look down on me!" 

Bang! 

Jin didn't have to know who sent him flying, he just lay there staring at the sky with a sad smile. 

"Mm, I really love your physique. It feels refreshing every time I beat it" 

"I don't think it can take it anymore" Whispered, Jin shedding crocodile tears. 

"I miss my brother!" 

"Look alive students!" Sora approached while the one who best Jin vanished in a bunch of smokes. 

"We are going to do a cleaning mission, rate, C-rank!" 

"Cleaning mission, is rated at C?" Kaze asks dubiously. 

"Duh, it means bandit or harassers around the village and trade routes" 

"Bingo!" 

Jin ducks from the sweeping arm of his teacher causing her to look at him for a second time and pause. 

"Hehe, teacher, my leg is itchy and I try to scratch it. It's just a coincidence" 

"Mm, I'll let this time slide" She then turns to the two. 

"Good, tomorrow we going to move out. Prepare and prepare! Don't worry too much and have a sound sleep" 

"Dismiss!" 

"Yes, Sensei!" Jin saluted and vanished utilizing his speed as fast as he could. 

Because every time their meeting ended, his teacher always beat him to test how far his physique progressed under strained and perilous beating. 

Sora sighed at Jin's antic and decided to leave the boy, For Now...

.....

 (1468 words)

Uh! I'm really lacking in Grammar! I'll try my best in minimizing it.