As Sasuke With 10-Quest System

In the middle of a certain deserted area, 80 thousand ninjas of the Shinobi alliance were gathered.

They were divided into 4 groups, and each one of them was under the leadership of a capable shinobi. The leaders of those groups were Kakashi, Gaara, Darui, and Akatsuchi.

Once the whole army was assembled, Gaara started his motivational speech to increase the morale of the ninjas and help them get along with the ninjas of the other villages.

Since the 5 Great Nations were always out for each other's blood, this much reaction from the ninjas was expected.

They were taught to hate each other since their childhood so it was hard for ninjas of a nation to work alongside the ninjas of other nations.

Either way, Gaara's speech ended and received a lot of applause from the soldiers.

'I can only sense an army of White Zetsu. There are no signs of any Edo Ninjas. Looks like I was worried for nothing. Let's go back and let these people deal with the enemy' Sasuke thought as he looked at the overall situation of the war from far above the sky.

After that, Sasuke teleported to the designated Headquarters of the Shinobi Alliance, where The 4 remaining Kages were waiting for his report.

"This war...We will win it," The Kages said in determination while standing beside each other. Neither of them noticed Sasuke's intrusion except Tsunade.

"You are back already?" Tsunade said as she turned around excitedly and hugged Sasuke.

Her reaction made everyone's jaw drop. They didn't know that they had such sort of relationship. Yes, they had some suspicions before, but now it was crystal clear that those two are a couple.

'It's good to be young. Though I wonder if he knows about her real age' Onoki thought

'I guess anything can happen in this heavens and earth' Raikage thought

'Hmph that bitch dare to lay hands on my man. Just watch, I will steal Sasuke from you' Mei Terumi thought

*Cough*Cough*

"So what's your report?" Raikage asked Sasuke who broke his very tight hug with Tsunade and reported his findings.

"About 100 thousand enemies are approaching our men, and all of them are those weird white creatures," Sasuke said, which raised the tension in the room.

"How did they get so many of those creatures?" Onoki sweated a little after hearing about the number of enemies. He and the other Kage had prior knowledge about White Zetsu which they got from Tsunade during The Kage Summit.

"I don't know. The biggest question is who are those people? Are they some sort of demons?" Mei said as she kept looking at Sasuke.

"It doesn't matter what they are. We will crush them all and achieve victory," Raikage said in a loud voice.

After that, Shikaku and Inoichi completed their setup to effectively communicate with the ninjas on the battlefield.

"Sasuke, you should go and rest a little. We would need your help if the enemy tried to infiltrate our ranks" Mei Terumi said as she winked at Sasuke. She thought she was being sneaky, but Tsunade managed to see what she was up to.

"She is right, Sasuke. Let me take you to your room" Tsunade said with a smirk as she grabbed Sasuke's hand and took him away. Mei could only curse at Tsunade for taking away her opportunity to seduce Sasuke.

....

The moment Tsunade and Sasuke entered a room, Sasuke immediately used some barriers and secured their privacy since he knew that Shikaku could peep inside the room without his barriers.

The moment Sasuke made those barriers, Tsunade jumped at Sasuke and sat on his dick and started kissing. She was so wet that Sasuke could feel her wet pussy through their clothes.

"I'm going to teach you Sage Mode right now," Sasuke said as he pulled out his penis and ripped Tsunade's underwear.

"Please give me more of your cum. I did my research on your sperm sample and found out that your sperm can give women a reverse and stop aging factor." Tsunade said as she grabbed his penis.

"Really? Is there such a thing?" Sasuke asked as he saw Tsunade's getting hornier every second.

"Yes, hubby. I'm so lucky to have you as my man. I can become young again as long as I have enough of your sperm" Tsunade said as she took off her clothes.

"I know I must satisfy my wife, but you have to endure it today so I can train you in Senjutsu," Sasuke said as he hugged Tsunade and tried to calm her down.

"I don't want it. I want sex, not training," Tsunade said as she rubbed her pussy on his dick.

"I won't let you run away from training today. Get ready" Sasuke said as he pushed his dick inside her pussy till it hit her womb.

"Aaahhh...yes hubby...move please" Tsunade muttered as she felt an incredible pleasure.

"Endure it and try to suck this nature energy of my dick through your pussy. You already have Wood Release, so this should be quite easy as long as you can endure it and control it," Sasuke said as he released some natural energy inside her.

"I'll.....ahhh...try....my best" Tsunade said as he moaned and tried to control the abundant natural energy entering her body. She hugged Sasuke tightly and closed her eyes to concentrate.

Soon, Sasuke felt his dick being clenched and devoured by Tsunade's pussy as some familiar markings appeared on her face. It was the sign that she successfully entered the Sage Mode.

"Sasuke, I feel refreshed and healthy. I have never felt this sort of power before" Tsunade said as she clenched her fists.

"That's not the only thing that has changed. Can't you tell the difference?" Sasuke said as he chuckled.

"What else has changed? Wait a minute." It took Tsunade some time to realize that the jutsu that she used to keep her young appearance was deactivated automatically.

"No way, I'm not using any jutsu to keep my youth but I'm still young. How did it happen?" Tsunade was shocked beyond belief. She didn't expect her body to become young again.

"I gave a lot of my sperm to you while supplying you with Sage Chakra, which changed your constitution drastically. After you told me the unique trait of my sperm, I decided to add it with Chakra and fill it in your body. The results are excellent. From now on, you will stay as a 40-year-old woman your whole life," Sasuke said as Tsunade's jaw dropped. She was straight-up stunned after hearing his explanation.

"Sasuke....Hubby...My Love" Tsunade said as she became emotional and couldn't find the words to thank Sasuke.

"Thank you so much. I can't thank you enough" Tsunade said as she hugged him yet again.

Sasuke didn't give her a reply but simply kissed her while thinking that he should use this method on all of his wives so they could stay beside him without any worries about their age. He was glad that he had found a way to keep his wives young forever.

"Now you can have sex as many times as you want," Sasuke said, to which Tsunade nodded and wiped off her tears.

While Sasuke and Tsunade were inside the sealed room. The situation outside had escalated quickly.

"We have been attacked from all sides. The war has begun," Shikaku said as he announced that all of the 4 divisions of the shinobi alliance had been attacked by the army of White Zetsu.

....

A.N: After re-reading this story of mine, I couldn't help but laugh at my writing lol. I can't believe I wrote so much bullshit. Now I understand why people didn't liked this story. Don't worry, I have learned from my mistakes and I'm trying my best to improve my writing.