After traveling through time, I became friends with Tsunade

In the deepest part of Mount Rishiri lies the terrifying secret laboratory belonging to Orochimaru.

The entrance to the laboratory is completely obscured by lush vegetation, with only a winding, dark, damp and narrow path leading into the interior.

The moment I stepped into the laboratory, I was hit by a strong and pungent smell of chemicals.

The surrounding walls are made of hard rock and rusty metal, with strange green vines climbing on them.

The room was filled with rows of huge glass containers, all filled with colorful liquids. All kinds of bizarre biological specimens were soaked in the liquids. Some had extremely distorted limbs and some had abnormally swollen organs.

The laboratory table was filled with various complicated instruments, and the metal texture flickered under the dim light.

The bookshelf next to it was piled with old and thick books. On the yellowed pages were records of Orochimaru's forbidden experiments over the years.

At the core of the laboratory, there is a huge operating table with strings of cold and ruthless iron chains hanging around it. There are still traces of blood on the table that have not yet completely dried.

In the corner, there were several huge culture tanks filled with turbid liquid. Some life forms that had not yet fully formed were slowly wriggling in them, making terrifying sounds.

Orochimaru was in the middle of this chaos. A fanatical and twisted smile appeared on his paper-pale face. He held a syringe tightly in his hand, and his eyes flashed with an extremely crazy light.

"Lord Orochimaru, Lord Yusuke has arrived at Mount Rishiri."

Pharmacist Dou appeared at the slightly old door of the laboratory while pushing his glasses.

Kabuto Yakushi looked at Orochimaru with a calm expression and a hint of respect.

"It looks like the experiment was successful. Kabuto, go out and ask Yusuke to come over."

Orochimaru didn't even raise his head, and his hands didn't stop moving at all, but an expression of excitement appeared on his face.

His experiment has hit a bottleneck, and the only thing missing is probably Yusuke's blood. If he could thoroughly study the principles of Yusuke's body, it would undoubtedly be a huge leap forward for his experiment.

......

At the foot of Mt. Rishiri, Kojiro and his men saw Yusuke and his group's carriage slowly approaching from a distance.

He did not dare to be negligent in the slightest and immediately walked forward quickly and saluted respectfully.

"Xiaojiro, prepare a banquet tonight. You follow Xiaojiro to the village first. I will go there later."

As soon as Yusuke got off the carriage, he sensed the whereabouts of Kabuto Yakushi. Even though these people were all his confidants, he still did not intend to expose the experiment and the matter of Orochimaru.

"Kimimaro, you have to listen to your master's wife, do you understand?"

Then, Yusuke said to Kimimaro with a slightly worried look. Kimimaro nodded solemnly, "I understand, teacher."

The others knew their identities and would not ask about Yusuke's affairs.

The same goes for Mei Terumi. After all, if Yusuke wanted her to know about it, she wouldn't need to ask him in person.

Until their backs completely disappeared from sight, Yakushi Kabuto slowly walked over, "Master Yusuke!"

"Kabuto, you've grown up. Nono misses you very much. When you have time, write a few letters and give them to Kojiro. Don't worry about wasting the resources on the channel side."

You Jie spoke gently, looking at the child in front of him who was about ten years old.

"Thank you, Yusuke-sama. Orochimaru-sama is waiting for you!"

Yakushi Kabuto lowered his head slightly, with a rare emotion flashing in his eyes. His eyes showed gratitude towards Yusuke, but also awe of his identity and strength.

After Yusuke nodded, he slowly turned around and walked towards the laboratory with steady steps.

In the laboratory, Orochimaru finally stopped the complicated experiment in his hands and took a rare rest.

"Congratulations, Yusuke, it seems you have mastered the power of the immortal!"

Orochimaru stared at Yusuke intently, with a meaningful smile on his face.

Yusuke didn't care about his inquiring gaze at all, and sat down next to him very casually, "Where are the experimental materials I asked you to prepare before?"

"I've been preparing for a long time, using potions to keep him alive."

Orochimaru licked his lips slightly. He had previously obtained Shimura Danzo's previous experimental data, and then after experiencing countless failures and destroying hundreds of experimental materials, he finally succeeded in keeping three people.

As early as two years ago, when Orochimaru began to study the power of the sage, Yusuke already had an idea in his mind. If he used the power of the sage to repair his parents' damaged bodies and replenish their vitality, he wondered if they would wake up.

"Take me there first, and we'll talk about other things later."

Yusuke looked calm, but he was a little nervous inside.

"If you ask me, Yusuke, you can discard all unnecessary emotions. These will only become your weaknesses. The enemy is not someone who will talk about morality with you."

As Yusuke passed Orochimaru, Orochimaru's leisurely voice slowly came out.

Yusuke stopped immediately after hearing this, "Orochimaru, are you concerned about me?"

There was a hint of laughter in Yusuke's voice. Orochimaru chuckled, "We are just a cooperative relationship. I just hope that this relationship can last a little longer."

Yusuke turned around and took a few steady steps in Orochimaru's direction before raising his hand and gently placing it on his shoulder.

"Orochimaru, even if you have learned all the ninjutsu, you can never abandon human emotions."

"hehe......"

Orochimaru laughed, and his shoulders twitched a few times. He reached out and lifted the slightly messy hair in front of his forehead.

"Okay, let's not talk about this boring stuff here. Come on, I'll take you there. But Yusuke, I need a tube of your blood." Orochimaru said seriously.

"It's up to you. This is also my support for you." Yusuke agreed without hesitation.

Yusuke knew very well that the ability of his String-String Fruit was not in his blood. Even if Orochimaru drained his blood, he would still not know how he had perfectly mastered the power of the Sage.

After all, this immortal may not really be an immortal, but the devil in the devil fruit is indeed a devil.

After getting Yusuke's consent, Orochimaru's steps suddenly became lighter, and in just a short while he arrived at the room where the experimental materials he had prepared for Yusuke were located.

"Do you need me to help you?"

Orochimaru asked proactively.

"Okay, you record their physical condition for me."

Yusuke thought about it and agreed.