A few years after the previous war in the last chapter,
Izuna had married Kyukyoyu Uchiha and had a son who was born with a fully matured three tomoe sharingan. Because of his fully matured sharingan at birth, Izuna named his son Naruto Uchiha-Naruto meaning maelstorm. Naruto Uchiha was born a few days before Minato's son. On the day on which Minato's son whom he had named Menma was born, the Kyuubi had escaped from Menma's mother and went on a rampage.
The day of the attack of Kyuubi
Menma had just been born, but the Kyuubi had been extracted from his mother, Kushina Uzumaki by a mysterious masked man right after Menma's birth when the seal was at it's weakest. She was very happy to see that her son was alive. Minato and Kushina kissed their son. He had blond hair and three whiskers. He looked very cute. Minato said, "I shall protect you and Menma. I am after all the Yondaime Hokage." Saying so, he put on his Hokage cape and flashed away. There he saw a masked man controlling the Kyuubi. He went to fight him but he phased into another dimension everytime he got attacked. Sonn, Minato outsmarted him, beat him and also placed a hiraishin seal on him. He then went along to the village to take care of the Kyuubi. There he met Izuna. Izuna was more or less sweaty. He said, "I get the most peaceful night's sleep in over two years, and you spoil it with this. What happened?" Minato explained what happened to Izuna. Izuna sighed in depression. He said, "You call yourself Hokage and let a mysterious masked man near your wife right after your baby's birth. What kind of Hokage lets that happen?! Anyway, lets take care of this damned fox." Miato saw the coming bijuudamma/Tailed beast bomb and said, "Never mind that. We have incoming." Izuna grinned and instantly used up kamui to send that bijuudamma into his Kamui time/space whereas Minato instantly used a teleportation seal to send it to the ocean. A part of it went in to the kamui whereas a part of it hit the ocean. Izuna frowned and said, "It was almost as big as he one I had used against Kumo. How in the hell dd my grandfather control this beast?" Minao was srprised and said, "You mean to say, Madara Uchiha could control the Kyuubi?" Izuna said, "Yes. He had Tsukiyomi and Amaterasu as his mangekyou sharingan abilities. I don't have tsukiyomi, instead I have Kamui." Saying so, he sighed. Those of his generation with Tsukiyomi weren't strong enough to control the Kyuubi. Minato said, "How I wish you had Tsukiyomi instead of Amaterasu. Kamui is good enough for that isn't it? Now we need to draw the Kyuubi out of Konoha." Izuna grinned and said, "Agreed. SUSANOÓ." Right as he said that, he manifested a huge Susanoó. Kyuubi got angrier seeing the Susanoó. It reminded him of Madara. Things just got worse for Konoha. Izuna used his own juudamma with extra lightning nature. The Kyuubi was hit with it and it got shot out of the village with ease. Then Izuna came down from the Susano'o which disappeared.
Izuna and Minato had driven the Kyuubi out of the village. Minato hiraishined his son and Kushina to the place. Kushina didn't have enough chakra remaining to become the jinchuriki of the kyuubi again, so it would ave to be Menma who had enough chakra to become the Jinchuriki of the Kyuubi. Izuna couldn't beleive it. He asked in rage, "Oi are you gonna seal the Kyuubi in a child? Have you lost your mind? He is not even a child. He is still a baby. Born a few minutes ago no less." Minato said, "Well I have no other choice. I can't carry that much chakra sealed inside of me. Neither can you. And thanks to your grandfather, Kyuubi goes nuts at your chakra. If he is sealed inside of you, you won't be able to control him. Besides, the kid has as much as if not more chakra than you." Izuna's face just sulked and he asked in a worried tone, "You do know that upon extrction of the bijuu, the jinchuriki shall die. You know Kushina wont survive unless you seal him back into her." Minato said, " She is unable to do that. Why do you think I am sealing it inside Menma instead?" Izuna was still worried. He said, "He is still a baby, Minato. I am here. You are here. Why your son?" Just as he said that, the Kyuubi had recovered from the hit and had com back for a rematch with Izuna and Minato. Minato used the Death Reaper seal and sealed off half of the Kyuubi inside himself. Just then it saw the preparations for the sealing of him inside the baby right over there. Minato used the Death Reaper seal and sealed off half of the Kyuubi inside himself. He said in rage, "Inside of a baby? I shall not be sealed inside a baby!" Saying so, the Kyuubi launched its paw at Menma. Just then Minato and Kushina had rushed to Menma's safety and had been stabbed by it's claw. Izuna screamed, "NOOOOOO." His eyeschanged from the Mangekyou Sharingan to Rinnegan. He said in the most emotionless creepy voice, "Kyuubi, you shall pay for what you have done." Then he manifested a lightning and fire armour and on both sides were the Rikudo symbol. He gave off a killing intent far stronger than the Kyuubi. The Kyuubi on the other hand wass more than surprised at the Rinnegan. He had never seen anyone with the Rinnegan other than Rikudo Sennin himself. Besides Rikudo Sennin never got angry. This guy, was about to kill him in anger right now. The Kyubi was afraid, but he would show this descendant of Madara that even the Rinnegan could not defeat him. Just then, Izuna was right above Kyuubi and hit the Kyuubi with a Juudamma far stronger than the first one. The Kyuubi was shot down by this. Its claw got out of Minato and Kushina. Izuna brought both of them to Menma who was crying. Minato and Kushina consoled him and they said their last words to him.
Then Minato spoke, "Izuna, take care of the village in my absence. Save as many people as you can. I and Kushina are beyond being saved. Become the Hokage Izuna, and try to see to it that your son and mine become good friends. I don't have much time left. I will seal the Kyubi/Nine Tails inside Menma along with my essence in case the Kyubi is completely out of control and Kushina's Chakra for when he fights the Kyubi. I have given the toads the key to the seal and I know that you won't let anything happen to Menma. Take Care Izuna. Farewell."
Izuna was overwhelmed at what his friend had asked of him and promised that he would not let anything happen to Menma. Soon the nine tails was sealed inside of Menma and Minato and Kushina breathed their last breaths.
Izuna went to the village and used his wood style to undo all the damage done by the Kyubi/Nine Tails. Though many people had already lost their lives, he used a lot of Chakra of his own to save as many people as he could.
Then the shinobi council met to decide the next Hokage and Izuna was once more offered the post of Hokage to which Izuna stood up and said," I will be the Gondaime/Fifth Hokage. Also, I will adopt Minato's son Menma as I have promised Minato that I would take care of Menma." The shinobi council agreed to his conditions and Menma was adopted by Izuna and Kyukyoyu and raised along with Naruto Uchiha. Izuna also drove out most of the civilians out of the administration and only those who were very influential civilians held their positions inside the administration.
There was also a huge part of the population which held the Uchiha responsible for the attack of the Kyubi. Thus, while the populous respected Izuna Uchiha as the Hokage, underneath they suspected him of being the mastermind of the attack of the Kyubi and quite frankly hated all Uchiha and the Uchiha were completely out casted from the common populous and Izuna was the only connection between the common populous and the Uchiha. This hatred gave rise to their suspicion that this was Izuna's way of completing his grandfather's job. While he was truly respected by the higher shinobi and his age old comrades, the others and the civilians still hated him and held him responsible for the attack of the Kyubi.
This hatred of the Uchiha grew and a few of them created a secret organisation inside the Uchiha who resented Izuna and the rest of the village which was practically all the Uchiha except for Izuna's family.