Chapter 525: Hidden Chakra Reserve Complete

Nighttime, at Tsunade's house.

Mu Yue and Tsunade were in the study conducting a final check on the developmental data for the Yang Seal.

With the assistance of Tsunade, the world's greatest medical ninja, plus his own diligent study of sealing techniques, Mu Yue was finally close to completing his power bank plan.

At this moment, Mu Yue was only one step away from the Yang Seal he had envisioned—making modifications and improvements to the existing Yang Seal within his body. The specific theory was already well-developed.

"I'm exhausted, it's finally over." Tsunade slumped into a chair without any dignity.

"But it was worth it, wasn't it? Not only did I perfect my Yang Seal, but you also completed the development of the Hundred Healings," Mu Yue said cheerfully, picking up his teacup and taking a sip.

While Tsunade helped Mu Yue perfect the Yang Seal, Mu Yue also assisted Tsunade in developing the accompanying techniques for the Yin Seal.

Without the Hundred Healings, the Yin Seal is nearly useless.

Tsunade rolled her eyes and said irritably, "You make it sound like mutual development and mutual benefit. I wasn't that eager to perfect the Yin Seal."

Tsunade studied the Yin Seal and the Hundred Healings purely out of boredom, to pass the time, not like Mu Yue, who wanted to boost his combat strength.

Because Tsunade had no intention of going to the battlefield or fighting as a ninja like before; she had no need to increase her power.

If the Hundred Healings didn't have some other useful applications, Tsunade wouldn't even bother researching it.

"This time, you have to make a lavish midnight snack—at least ten times as sumptuous as a normal dinner!" Tsunade said, looking dead serious.

In a sense, this might be a farewell meal, and Tsunade was determined to eat her fill.

It wasn't that Tsunade was planning to leave Konoha; Konoha was still caught in the vortex of war, so she couldn't easily leave.

It was that she felt her interactions with Mu Yue would decrease from now on—at the very least, things like him coming to her house to help cook would probably be hard to come by again.

Because the reason Mu Yue had gotten to know Tsunade was that he wanted to learn knowledge from her in order to develop the Yang Seal.

Later, after their relationship improved and Mu Yue provided some benefits, Tsunade agreed to help him with the development.

Now that the jutsu development was complete, Mu Yue no longer needed her as much.

Without being in a position where he needed something from her, Tsunade wasn't confident she could get Mu Yue to obediently come to her house and cook.

After all, she was one of the Sannin, and Mu Yue was also the renowned Blazing Sun Mu Yue—not an ordinary ninja.

"Alright, once I finish the last step, I'll prepare a midnight snack that will definitely satisfy you." Mu Yue nodded.

Developing the Yang Seal was no easy task. If not for Tsunade's help, it would have taken him several more years to succeed.

So even if Tsunade wanted a full imperial feast, Mu Yue would make it happen.

The Yang Seal was extremely important to him—even more important than a perfect-level skill.

"You said it yourself. If I'm not satisfied, don't blame me for making more demands." Tsunade's eyes lit up.

"Mm, I said it."

"Then hurry up and do the last step." Tsunade urged him.

She couldn't wait to enjoy the midnight snack that Mu Yue had promised would definitely satisfy her.

Mu Yue wasn't one to boast. If he said he could satisfy her, he would definitely pull out all the stops to make a great meal.

Actually, even if Tsunade hadn't urged him, Mu Yue was about to start. This was a jutsu he had been planning ever since he first transmigrated. Now that it was finally complete, his inner calm was just as shaken as his outward appearance.

Although the Yang Seal couldn't raise his upper limit, it could improve his stamina, which was of great significance to Mu Yue.

"Hah." Mu Yue closed his eyes, regulated his breathing, and focused his breath to the extreme, entering the state of the Transparent World.

His next operation required very high precision; otherwise, he could get injured—internal injuries at that, and in severe cases, it might even damage his chakra pathway system.

That was another reason why Mu Yue chose to perform the procedure beside Tsunade—if an accident occurred, the world's greatest healer could treat him.

The Yang Seal before perfection was like the Yin Seal without the Hundred Healings: it couldn't be said to be completely useless, only that it might be useful—but generally, that possibility was slim.

Of course, that was for ordinary ninja. In fact, it still had considerable use for Mu Yue.

Because even before complete perfection, Mu Yue had made a minor breakthrough: he could apply it to shadow clones, continuously releasing a trace amount of chakra to maintain them, solving the problem of shadow clone duration and making his multi-tasking operations easier.

In essence, perfecting the Yang Seal was similar to the Yin Seal's Hundred Healings.

Only the actual effects differed: the Yin Seal provided automatic healing and enhanced strength, while the Yang Seal was bound by Mu Yue to the Breathing Chakra Mode.

As long as he updated the version of the Yang Seal within his body, from then on Muyue would essentially have an extra chakra pool, except this pool could only be used for a specific Breathing Technique chakra mode.

"Flame Breathing, I guess. For now, Fire Release is the strongest." Muyue chose Flame Breathing.

There were considerable differences between the various Breathing Techniques, so the current Yang Seal only supported a single Breathing Technique chakra mode and could not accommodate all Breathing Technique chakra modes.

However, that didn't have much impact on Muyue. If he encountered an enemy that required switching Breathing Techniques, he could just turn off the Yang Seal.

After all, this wasn't the Eight Gates' Dead Gate—once opened, it couldn't be closed.

Once Muyue finished everything, he began refining chakra and pouring it into the Yang Seal.

After accumulating a certain amount of chakra, Muyue stopped refining and opened his eyes. A flame-like mark slowly appeared on his forehead.

"Did it work?" Tsunade asked, looking at Muyue's calm aura.

She didn't have abilities like the Byakugan or the Transparent World, so she could only rely on experience to judge whether Muyue had succeeded or failed.

"It should have worked." Muyue felt the Yang Seal and then answered.

Originally, the Yang Seal in Muyue's body could also store and release chakra.

Storage was fine—as long as it didn't exceed a certain amount, there were no issues—but releasing chakra was a big problem. Even a little too much could easily cause chakra disorder.

Now it was different. Just now, Muyue tried to use the chakra inside the Yang Seal, but the chakra inside it didn't budge.

This was the difference after perfecting the Yang Seal. Yang Seal · Release was essentially entering Breathing Technique chakra mode; when not in Breathing Technique chakra mode, chakra inside the Yang Seal only entered and never left.

"Let me check." Tsunade stood up, walked over to Muyue, and directly reached out to touch several important chakra acupoints related to the Yang Seal.

"It's perfect." Tsunade commented.

Even if Tsunade had done it herself, she wouldn't have been confident in achieving what Muyue did—this was an operation inside a human body.

"Once I've stored enough chakra, I'll enter Flame Breathing chakra mode and test it. If there are no problems, I'll teach it to Kakashi," Muyue thought to himself.

A great ninjutsu like the Yang Seal was naturally something Muyue wanted to teach his disciples.

Every one of his disciples was a big chakra consumer, limited by their age and bodies.

Except for Might Guy, who had the Eight Gates, the rest of his disciples could all see considerable improvement if they learned the Yang Seal.

But for now, Muyue only planned to teach it to Kakashi.

That was because the new version of the Yang Seal had a prerequisite: extremely high precision in controlling chakra inside the body.

If this condition wasn't met, learning the Yang Seal would be equivalent to self-harm.

This was why Tsunade and Jiraiya had both advised Muyue not to waste time on the Yang Seal back then—Muyue's design concept for the Yang Seal didn't seem like something a person could actually train in.

Only Kakashi, who had also mastered the Transparent World, had any chance of successfully cultivating Muyue's Yang Seal.

As for the remaining disciples, Muyue couldn't do anything—he could only wait for them to master the Transparent World too, or for Muyue to make further breakthroughs with the Yang Seal and reduce the difficulty.

"Since it's done, hurry up and prepare the late-night snack!" Tsunade patted Muyue's shoulder and urged.

She wanted to fast-forward to snack time.

"If you're hungry, I can send a Shadow Clone back to get some pastries to hold you over. Preparing the late-night snack will take a long time," Muyue reminded.

Even though he had the chef skill, that didn't mean all his cooking was at the same level.

The more effort and care Muyue put in, the better the final dish would taste.

Tsunade had helped Muyue a lot, so he naturally wouldn't skimp on time and would do his best to make the most delicious food.

Tsunade initially wanted to agree, but after thinking it over, if she ate pastries, she'd have to eat less of the late-night snack later.

Although Muyue's pastries were tasty, a big meal was clearly more appealing to Tsunade.

"Go get them." Tsunade still agreed.

Because she could save them for tomorrow, or give them to Shizune—that way Shizune would eat less during the late-night snack.

Muyue formed hand seals to split off a Shadow Clone. The original body began preparing the late-night snack, while the clone returned to their home in the main city district.

Muyue had already prepared all the necessary ingredients. He walked into the kitchen with extreme familiarity and began processing each ingredient quickly.

The noise of Muyue cooking was heard by Shizune, who was reading a book.

"Mu Yue-sensei, let me help." Shizune walked out of the room and into the kitchen, taking the initiative to say.

Shizune was not someone who liked to freeload.

"No need, just leave it to me." Mu Yue declined.

Shizune hesitated for a moment, but seeing Mu Yue's firm attitude, she ultimately nodded and returned to the living room.

Seeing Tsunade lying on the sofa, Shizune felt both angry and helpless.

This home was neither hers nor Mu Yue's—it was Tsunade's.

Yet Mu Yue was cooking in the kitchen while Tsunade didn't help and just lay around in the living room like a corpse.

"Tsunade-sama, really, why are you making Mu Yue-sensei cook a late-night snack at this hour?" Shizune couldn't help complaining.

Shizune was sure that Tsunade had been the one to ask for a late-night snack, and Mu Yue had reluctantly agreed.

Seeing such a wonderful Mu Yue-sensei being exploited by Tsunade, Shizune's heart ached.

Although Tsunade had done a great kindness to Shizune, Mu Yue had also served as Shizune's teacher for a long time, so this time Shizune sided with Mu Yue.

"If I wanted to eat, I could just make it myself."

Tsunade sat up, grabbed Shizune's soft, fair little face with both hands, and kneaded it.

"It's all your fault, Shizune. If your cooking were as good as Mu Yue's, would I still need to ask him?" Tsunade said with complete conviction.

Shizune was speechless. Sorry that her cooking wasn't as good as Mu Yue-sensei's.

If Tsunade had compared her to anyone else, Shizune would have done some self-reflection, but Mu Yue's cooking skill was a mountain so high Shizune couldn't even see the top—she truly had no power to match it.

"But it's fine—I'm magnanimous, so I forgive you." Tsunade put on a generous air.

Shizune was about to say thank you, but then realized she hadn't done anything wrong, so she took out some medical books from the room and sat beside Tsunade to read.

She didn't have Tsunade's talent, so she needed to work even harder to grasp what Tsunade taught.

In terms of persistence and determination, Shizune could surpass many Konoha shinobi.

After all, from the very beginning she had followed a Tsunade who was in a slacking-off state, yet Shizune not only didn't slack off along with Tsunade but also strived to improve—that showed her mentality.

Not long after, a shadow clone brought over the pastries.

Tsunade took the pastries and handed them to Shizune with a smile, saying:

"Your favorite Mu Yue's secret recipe pastries. Don't eat them all, at least leave half for me."

Shizune looked at Tsunade in surprise. In the past, Tsunade would always wolf down a bunch first before remembering her. What was up with her today?

Feeling a bit worried, Shizune reached out and touched Tsunade's forehead, then showed a puzzled expression. "Not even warm."

Tsunade's face was covered in black lines as she looked at Shizune. Just what kind of image did she have in Shizune's heart?

"Hmph, so this is how you see me, Shizune." Tsunade crossed her arms, looking displeased.

Shizune put down her book, her expression a bit awkward.

Without comparison, there's no harm. Compared to a perfect teacher like Mu Yue, Tsunade—who was often drunk, lost all her money at the casino, and needed her, a kid, to take care of her—was truly unreliable.

"Tsunade-sama, I'm sorry." Shizune apologized sincerely.

But Tsunade's expression still didn't change.

Shizune got up, walked behind the sofa, and started massaging Tsunade's shoulders and back. Only then did Tsunade's expression soften.

"I wronged you, Tsunade-sama. Although you're not as perfect as Mu Yue-sensei, you take good care of me too." After serving Tsunade, Shizune ate Mu Yue's pastries with a happy expression.

Feeling guilty toward Tsunade, Shizune didn't eat half—she only ate a third, planning to leave the rest for Tsunade.

"All the dishes are done."

After a long wait, Mu Yue brought out dish after dish.

There were both many excellent dishes from Mu Yue's past life that had great appearance and flavor, as well as some native dishes from the Naruto world—the emphasis was on variety.

Seeing the dishes piled up on the dining table to the point they could barely fit, Tsunade gave Mu Yue a thumbs-up, then quickly washed her hands and dug in.

Even Shizune couldn't maintain her composure in front of Mu Yue and started an immersive eating frenzy.

After Shizune truly couldn't eat anymore, she put down her chopsticks with a look of regret, then she remembered something and looked at Tsunade with a resentful expression.

Tsunade-sama, you are truly despicable.

"This is the world of adults," Tsunade sighed inwardly, then continued to immerse herself in eating.

After finishing this meal, who knows when the next time I'll eat Muyue's cooking will be.

Should I just take the initiative to freeload?

xhytd