Playing Ninjutsu in Jujutsu Kaisen!

"What are you two arguing about?"

A familiar yet unfamiliar voice came from behind them. Both turned their heads and saw Vice-Captain Natsu Hiraku. They quickly said, "It's nothing, we're just bickering like usual."

Their eyes held a hint of expectation after they spoke.

Natsu Hiraku naturally knew why their eyes held such anticipation. He cleared his throat twice and said, "While I won't teach you specific moves, we can spar. I'll offer some advice during our practice."

This Vice-Captain is serious, we're going to cry!

Go-in Roku quickly said, "It's fine, it's fine, no need to trouble you, Vice-Captain, to teach us any moves. Just giving some advice is enough."

Ryusui Ruo Bing took out an unopened pack of cigarettes from his pocket and said, "Right, Vice-Captain, do you smoke? Want one?"

"You dare offer that garbage cigarette?"

Go-in Roku also took out a pack of cigarettes from his pocket and said, "His cigarettes are cheap and scratchy. Mine are expensive and soothing."

"..."

Damn it, this is the first time I've heard of cigarettes being soothing for the throat... I've never smoked, but you don't have to lie to me like this, do you? Your cigarettes are probably made from Throat Lozenge.

Natsu Hiraku was speechless and quickly declined, "No, I don't smoke yet. Anyway, there aren't many people on the street right now, so just spar with me here for a bit."

"Okay, Vice-Captain, please wait a moment."

The two quickly took off their outer uniforms, revealing their short-sleeved shirts underneath. Although their muscles weren't as exaggerated as those in the academy, they were definitely stronger than him.

"Alright, is it one-on-one, or how should we do this?"

"Does that even need asking? Of course, we'll both go at you at once."

Natsu Hiraku grinned, got into a stance, and beckoned them over.

"Clap, clap, clap, thud..."

The sounds of impact echoed through the street. If any passersby had been there, they would have seen two adults being unilaterally suppressed by a scrawny child.

Even more astonishing was that the child seemed to be holding back, nimbly dodging their fierce attacks before closing in on them, seemingly muttering something.

"Too slow."

"Not enough leg strength."

"Your stance isn't stable enough."

"You have aggression, but lack power."

Natsu Hiraku briefly pointed out their flaws while closing in on them. When he couldn't dodge, he would intervene. His current goal was to draw out their full strength.

Learning, guiding, correcting.

This wasn't just about fixing their mistakes; it was also about adding meaning to his own combat experience. By using Cursed Energy, he adjusted his own strength to be similar to theirs.

Then, he taught them from that point. It was also a form of training for himself. It wasn't difficult, but it wasn't easy either. It was perfect for reviewing what he had learned yesterday.

The fight between the three quickly attracted the attention of passing patrol officers. They initially watched with a casual attitude but couldn't tear themselves away after a glance, whispering amongst themselves.

"What is Vice-Captain Natsu doing? Shouldn't he spar with us from the academy if he wants to practice? Those two are so weak."

"How would I know? But Vice-Captain Natsu seems to be teaching them. Besides blocking a few times, he's been dodging the whole time."

"Really? These two lucky guys are going to defy the heavens!?"

"What are you looking at? Aren't you supposed to be patrolling?"

Ido Shuichi's sudden appearance startled the onlookers. His gruff voice made the three fighting outside stop their movements.

"We... we're going now, Captain."

The one leading the onlookers, Shorou, waved his hand at the brothers beside him, signaling them to leave quickly.

"Right, right, we're returning to our posts now. Goodbye, Captain."

The people beside him weren't stupid. They quickly nodded in agreement and prepared to leave, following Shorou.

"Since you've all been watching for so long, how about training together tomorrow? While I can't teach you specific moves, I can offer some guidance."

Natsu Hiraku's voice startled the departing crowd. Ido Shuichi also looked at his unique disciple with interest. The rules of the team were all set by him.

The weak were only fit to guard the gate, while the strong had the right to climb higher. He wanted everyone who joined this team to have the desire to become stronger. After all, those who didn't want to improve and just coasted had already died on the battlefield. Those who remained, despite the gap in strength, were still considered strong outside.

As for so-called quitting?

Heh, from the moment you signed this lifetime contract, it became impossible. The salary was high, and there were three months of vacation every year. But if you were found to have deserted, you would have to pay with your life.

There was training, too, for three months. Otherwise, sending new recruits directly to the battlefield would be like sending them to their deaths. As for how much they could learn in those three months, it all depended on their own comprehension. He had taught them, so if they died, it could only mean... they deserved it.

Go-in Roku and Ryusui Ruo Bing were stunned. They thought this was their chance to turn things around, but they didn't expect the Vice-Captain to extend his favor to others as well. Although they felt a bit disappointed, they didn't dwell on it for too long.

After all, he was the Vice-Captain. It wouldn't be reasonable for him to show favoritism just because they met. Moreover, they had already learned a lot today. It was better to train their bodies and correct their mistakes than to complain.

They would strive to spar a few more times before the Vice-Captain left!

At this moment, someone in the team chat posted:

[Vice-Captain Natsu will be personally guiding our training. Everyone should find Vice-Captain Natsu quickly while you have the chance and squeeze him dry before he leaves.]

Initially, no one paid much attention to this message. It wasn't until two hours later, during the shift change, that the group chat exploded!

A bunch of people are asking where the Vice-Captain is? I want to ask him for advice.

Ido Shuichi was lying in bed, preparing to sleep, and glanced at the squad chat.

99+

He muttered to himself, 'What's gotten into these brats? They wouldn't be this active even if I died.'

He clicked it open and saw nothing but:

[Location of Vice-Captain Luo!]

[Location of Vice-Captain Luo!]

[Location of Vice-Captain...]

He was utterly speechless and grumbled, "Screaming your lungs out and digging three feet underground won't help. That kid's already gone out with Mitsuchi Mi. Who knows when he'll be back. I'm going to sleep."

It was 7:55 AM.

Mitsuchi Mi, dressed in a cool, white tracksuit, was jogging on the street. Passersby were giving her admiring glances, captivated by her alluring figure and vibrant appearance.

Natsu Hiraku followed beside her, sighing as he looked at her bare left hand. He wondered when she would finally wear the ring outside. If she never wore it, it meant he'd miss his chance.

Forcibly engaging a Quasi Grade 1 Cursed Spirit inside the villa would undoubtedly result in significant casualties. The most likely outcome was that he wouldn't be able to defeat it, causing the Cursed Spirit to go berserk and wipe out everyone in the villa.

"Sister, you look so beautiful today. It would be even better if you wore that ring."

"Is that so?"

Mitsuchi Mi looked down at her bare left hand and clenched it slightly. She seemed to see her mother's right hand in her mind's eye, a bitter smile playing on her lips. "Maybe next time. It would be bad if I lost it."

"..."

Natsu Hiraku didn't know what else to say. Right now, she was like the heroine in a dating sim; getting her to wear the ring out of the house felt like a fantasy.

But if she didn't wear it, it would affect his chance to steal the ring on the last day. If he couldn't steal it, the mission would fail. This mission had no time limit, and it could potentially block all subsequent missions...

His Sharingan, at its current level, couldn't forcibly change someone's will. This mission wasn't just about a difficult Cursed Spirit; he wouldn't even be able to achieve the entry requirement.

"Entry Requirement: Have Mitsuchi Mi wear the ring out of the house..."

"Tsk..."

Natsu Hiraku felt a wave of annoyance. Wicked thoughts flashed through his mind, but his last shred of reason calmed them.

For example, ignoring the ordinary people and directly fighting the Quasi Grade 1 Cursed Spirit on the last day.

Or having Gojo Satoru directly exorcise the Cursed Spirit. In that case, the System would likely declare the mission failed. But clearly, both of these options were the worst-case scenarios, plans to be used only as a last resort.

Forcing a fight. If he won, he'd get twelve consecutive draws and a permanent +100 Cursed Energy bonus, but the consequence would be being hunted by Teacher Gojo and the others...

After all, it was impossible for no one to die. At best, he'd be imprisoned; at worst, he'd be directly sentenced to death by the higher-ups of the Jujutsu world.

Sigh, let's continue the "romance" strategy. There are still 13 days left, so I'll take it slow. I never expected the System's third mission to be nightmare difficulty.

Wait...

It seems I was the one who unlocked the nightmare difficulty mission. If I hadn't saved her back then, none of this would have happened...

What the hell!

The clown is me!

"Sister, can you wear the ring tomorrow~? The ring looks really amazing on you, Sister!"

His soft, pleading voice echoed in Mitsuchi Mi's ears. Natsu Hiraku was clearly desperate, resorting to using his advantages.

Which was to act cute.

After all, he was only 15 years old right now. If persuasion didn't work, acting cute definitely would.

"Even your cuteness won't work, you know."

Mitsuchi Mi directly refused, "That's a precious item left to me by my mother. I absolutely won't wear it out."

"..."

You're forcing my hand, woman!

Natsu Hiraku raised his voice and said in a soft, cute tone, "But, if it were your mother, she would definitely want you to wear it all the time, right?"

This statement instantly made Mitsuchi Mi fall into thought. Her steps, which had been moving forward, slowly halted. Natsu Hiraku, behind her, wore a triumphant expression.

He laughed inwardly: 'Hahaha! Who says acting cute doesn't work? Isn't it working? As long as I can complete the System's mission, I'd cross-dress without blinking, let alone act cute.'

Mitsuchi Mi looked at her left hand, her eyes moved. Seeing that the time was right, Natsu Hiraku continued, "Actually, Sister, you can wear it all day. With me here, I guarantee it won't slip off your hand. Sister can try to trust me."

This time, Mitsuchi Mi didn't refuse directly. Instead, she pondered for a moment and said, "I'll consider it."

Night.

Natsu Hiraku went to the small hut from yesterday as if he owned the place. Seeing the open iron gate, he heard the sound of "clang clang dong" before he even walked in, indicating the force with which it was hit.

He walked in and saw Ido Shuichi fiercely punching a wooden dummy. He waved and called out, "Good evening, Master Shuichi."

"Good."

Ido Shuichi stopped and wiped the sweat from his brow. He glanced at the clock on the wall. It was exactly eight o'clock. "You're quite punctual."

"Of course, I'm on time."

Natsu Hiraku said confidently, then sat on the chair and looked at the three large gold watches and sunglasses on the table, which hadn't moved at all. He continued, "Are we learning first today, or sparring first?"

"Heh, of course, sparring first. That way, you won't be bleeding from your eyes while learning."

Ido Shuichi said, half-jokingly, then took off his sweat-soaked clothes, revealing the robust muscles hidden beneath. He continued, "There's no time limit today. I'll beat you black and blue!"

"This..."

Natsu Hiraku looked at his master, Shuichi, who was eager to fight, and felt like collapsing inside. He's this old, but his temper is still like a child's. Is that really okay? Fine, he'd just have to face it head-on and try out what he learned yesterday!

He took off the clothes he bought while shopping with Mitsuchi Mi that morning and put them on the table. After stretching and warming up, he directly used Cursed Spirit to strengthen his body. Scarlet Cursed Energy instantly covered his entire body, then dissipated.

He waved his hand at his master, who was already eager to fight, and said, "I'm ready."

As soon as he finished speaking, Ido Shuichi didn't reply. Instead, he powerfully flexed his calves, his bulging muscles like steel. The three-meter distance was covered in an instant.

Natsu Hiraku saw his master approaching, his fist the size of a sandbag coming directly at his face. He quickly raised his arms to block.

"Slap!"

A crisp sound echoed in the room. The moment Natsu Hiraku touched the punch, he was sent flying. History repeated itself. Yesterday, he was sent flying and hit a tree trunk; today, he crashed directly into a solid wall.

"It's not over yet!"

After yesterday's fight, Ido Shuichi had a rough idea of how durable his disciple was. He decided to just go all out!

His veins bulging, his fists rained down on Natsu Hiraku, who hadn't gotten up yet. Each punch felt like hitting an iron plate, unmovable.