Chapter 8: Biggest Gold Mine

"The difficulty of this ninjutsu lies in instantly compressing a large amount of chakra into the shape of a fire dragon," Rei explained while demonstrating the ninjutsu's release technique to Shisui.

Rei had recently gained mastery over chakra form manipulation, so he also shared a lot of information about chakra form manipulation with Shisui.

"I see, I think I understand a bit," Shisui nodded, ready to give it a try.

Shisui's hands quickly formed seals, chakra erupted from his body, then compressed and shaped.

"Fire Release: Great Dragon Fire Technique!"

Shisui opened his mouth and spat out a meter-high fire dragon that soared into the sky, circling once before plunging into the water.

Clap! Clap!

Rei applauded Shisui with a smile and said:

"I thought you might need to try it a few times before you could succeed, but it seems I underestimated your talent."

Rei was genuinely surprised. Without even using the Sharingan to copy, Shisui had managed to master B-rank ninjutsu in no time at all. Was this the value of having a dual S-rank talent?

"It's because you taught me well, Rei-sensei," Shisui said modestly.

He didn't deny that he learned things faster than ordinary people, but he also genuinely felt that Rei taught very seriously and well.

Except for the first time when he was showing off and only used one seal, Rei performed the complete sequence of seals when demonstrating, slowing down his movements and explaining each step along the way.

"And you can't say I've mastered it yet, I can only use it," Shisui thought to himself, comparing his own Great Dragon Fire to Rei's. He still had a long way to go in terms of both the size and number of fire dragons he could create.

"Then I'll demonstrate the Great Dragon Fire Technique that I've mastered a few more times for you," Rei said with a smile.

He was pleased with Shisui's modesty and diligence. Looking at the chakra bar on his panel that was rising every day, he knew that Shisui hadn't been idle either when he went back home.

Time always seems to pass quickly when one is focused, and by the time Shisui was immersed in Rei's teaching, the sky had already darkened.

It was only when Shisui released his Great Dragon Fire that he noticed how bright the flames were. He realized that it was almost dark.

A strange thought crossed Shisui's mind. Could Rei-sensei's gentle voice be some kind of ninjutsu technique that made him forget the passage of time?

"Sensei, I'm going home," Shisui said goodbye to Rei, preparing to leave.

"I've also summarized my experience in training chakra form manipulation recently. You should take a look when you get back," Rei said, handing Shisui a small booklet.

Shisui paused for a moment, then took the booklet from Rei, bowing his head in thanks.

Although he didn't say much, Shisui's respect for Rei had grown even more.

He felt that Rei was an excellent teacher. Although they had only been teacher and student for four days, Rei had never held back anything. He always taught him the most important things first, never keeping anything to himself.

Watching Shisui's departing back, Rei raised the corners of his mouth and smiled. Truly, Shisui was his biggest gold mine, consistently yielding good results.

[You have gifted your disciple a Chakra Form Manipulation Training Manual. Due to your disciple's extreme gratitude, the reward has crit, and you have obtained the ninjutsu Wind Release: Pressure Damage (Mastered Level).]

A massive amount of information about the techniques and usage of Wind Release: Oppressive Seal instantly appeared in Rei's mind, along with some knowledge of wind attribute chakra nature transformation.

Rei was very satisfied with this reward.

Wind Release: Pressure Damage was a very powerful ninjutsu, one of the top in Wind Release. It had a large range, high damage, and could even be combined with his Fire Release ninjutsu.

In addition, the wind attribute nature transformation gifted by the system was also beneficial for him to develop the nature transformation of the Rasengan.

Originally, he had planned to develop the fire attribute chakra nature transformation of the Rasengan himself. Since he had wind, he would definitely develop it to the Rasengan first.

After a few days of exploration, Rei had roughly figured out the mechanism of the apprentice return system. The reward was affected by two factors: the quality of the gift he gave and the disciple's gratitude for the gift. The latter factor was more important.

When he gave Shisui a string of snacks the second day, the system gave him ten kunai.

When he gave Shisui food he had made himself the third day, the system gave him 50 chakra points.

All the 'offerings' were food, but the reward on the third day was clearly better. This was obviously because the third reward was more "heartfelt" and Shisui liked it more.

Having figured out the mechanism, Rei began to plan how to get Shisui to give him a big reward. He planned to go to the school the next day to check Shisui's information and see when Shisui's birthday was.

...

Day 5 in the Naruto World

Rei only had one class today, but a third-grade teacher in the office had something to do and needed someone to substitute for him. Rei would naturally not miss such an opportunity to do well.

He got 20 chakra points for one class and a Great Fireball for the other.

This was the first time Rei had obtained a ninjutsu that he already knew. However, to his surprise, the system directly increased the training experience of the ninjutsu for repeated ninjutsu.

If it were a game, he would have a one-life Great Fireball or a +1 strengthened Great Fireball.

"Rei-sensei, you're too easy to talk to. If you go on like this, other teachers will definitely ask you to substitute for them," Ueda Aya said worriedly.

Rei thought to himself, "Is there such a good thing? Then I would love it."

"We're all colleagues. It's okay, and I also really enjoy teaching students," Rei said with a smile.

Ueda Aya didn't know what to say for a while, because, from Rei's expression, she felt that Rei was sincere.

She felt like she was in a dream. Were there really such good people in the world? They didn't even get paid for substitute teaching, which was basically working for free.

Time soon came to the weekend.

The ninja school was similar to his previous life, with classes from Monday to Friday and weekends off.

Because of the previous agreement, at 8:00 in the morning, Rei took Obito and Might Guy to the place where he and Shisui trained and began their "special training."

"Why do we have to get up so early on weekend?" Obito groaned, lying on the desk that Rei had prepared in advance.

"Early? I think it's okay," Might Guy scratched his head, unable to empathize with Obito.

Rei handed out the test papers he had prepared in advance to the two. These were test papers that Rei had written himself according to their teaching progress. After all, they had only been in class for five days, so they couldn't just take last year's monthly exam papers, right?

Moreover, for the two of them, Rei didn't plan to let them tackle difficult problems. They should just get the easy points and pass.

"Rei-sensei, this is..."

Before long, Shisui, who was ready to train, also arrived. He was very puzzled when he saw Obito and Guy doing their homework with faces full of suffering.

"They are fourth-grade students, I'm tutoring them. You go on with your cultivation, it doesn't matter," Rei explained.

Shisui's arrival was not a coincidence, he had called him last night.

As for the purpose, Rei thought it would be very interesting for upper-grade students to do boring test papers while watching their lower-grade juniors train some cool looking ninjutsu.