Itachi Nii's house….
"Fugaku you really want the negotiation to fail" while sipping the drink Third Hokage asked.
"Hiruzen there is no way we can negotiate in the current situation"
Third Hokage, "That can't be helped then which side do you think Itachi will stand, village or the Uchiha clan?"
"Of course my son will choose the Uchiha clan. Even if he hates the Uchiha clan he wants to protect his most beloved brother Sasuke. So he will choose us."
The third Hokage, "Then let me ask you another question. If the village offers Itachi the life of the Sasuke in return for supporting us the village. Now, which side do you think he will choose?"
Fugaku san was shocked. He thought that Itachi will be by his side for the sake of Sasuke but …..
With the calm face awakening, the Sharingan Fugaku san asked "Hiruzen are you threatening me with this to negotiate?"
"Fugaku I am not threatening I am just stating the facts here. You know if the civil war takes place between the Uchiha clan and the Leaf Village other villages will also interfere and the world war happens."
Fugaku san stayed silent while his eyes closed for some time.
"Hiruzen coup d'état can't be stopped. The pride of the Uchiha can't understand by Sarutobi. Even if I want to negotiate other Uchiha clansmen will not agree with it and they will start the coup d'état without me"
"Hiruzen and also don't expect me to sacrifice some of my clansmen for negotiation. Since I am the clan leader I will live and die along with them"
"WE WiLL START THAT THE COUP DETAT TOMORROW"
With that Fugaku san is clearly giving the message that if you want to do something do it tonight. He also doesn't want to see another world war. His original plan was along with Itachi want to take administration of the leaf village without any bloodshed. Since Itachi chosen village so be it.
"Do you have anything to say to Itachi?"Third Hokage asked.
"I will be waiting for him here"
...…..
Outside the Uchiha Clan
"You also know I also know that this negotiation will fail" I answered the Masked man.
"Then why do ask for the Negotiation in the first place?"
"Of course it is for Itachi Nii"
Itachi nii who was silent during the whole conversation was confused. His facial expression was like Me!?
"I just don't want Itachi Nii to have any regret later for not trying the negotiation or kind of thoughts like if I listened to Third Hokage and wait for few more days and the negotiation happened which may lead to the Uchiha survival."
"The burden Itachi Nii was going to carry is so big. So I want to lighten the burden as much as possible."
Mask man, "Little brat that was so thoughtful of you"
At that time Third Hokage came out of the Uchiha clan. The Masked man uses Kamui to hide himself.
"Itachi I'm really sorry. That negotiation is failed. I give permission to carry out your last mission and report to me. Your father is in your house" with that Third Hokage left.
"Itachi Nii I will I will be waiting for you in the Training ground" with that I left.
Itachi Nii put his mask on to start the massacre. He started to kill mercilessly his own clansmen. He didn't let anyone from his eyes. At one stage he was covered by his own clansmen blood. After finishing all that he went to his house to meet his parents.
While Itachi Nii was massacring inside the Uchiha clan Mr. Masked man started his massacre from the Konoha Military Police. And then he went for the Uchiha clansmen wandering around the village.
While that was happening Mr.Masked man spotted Izumi Uchiha and started to attack her but it was blocked by a shinobi. That was me of course.
"What are you doing little brat?" The masked man asked me.
"She is my prey. You can't touch her."
"Just make sure finish it." With that, he left.
"Izumi san why don't we wait for Itachi Nii in the training ground" with that I left with Izumi san.
....
Itachi Nii's House
"Here. There are no traps so you can come in"
Itachi Nii heard the voice of his father Fugaku san. After entering the room Itachi Nii could see the back view of their parents sitting.
"One of the main reason for me to accept this result is that I don't want to have a deathmatch with my own son"
"Itachi even if our philosophers differ I am still proud of you. Don't hesitate. Compare to yours our pain will end in an instant. Promise me Itachi that you will take care of Sasuke"
Tears started to fall over from his Sharingan eyes. His hands were shaking. He couldn't help but hesitate. This was the worst situation any human can achieve. Killing your own parents for other's good.
"I will"
With that, he raised his sword and killed his parents.
At the same time, Sasuke enters the house only to see his dead parents. When he asked what happened Itachi Nii used Tsukuyomi to show Itachi that he killed his parents. Sasuke got scared and ran away but Itachi went after him and planted hatred inside him. With this incident, Sasuke awakened his Sharingan.
.....
Training Ground
Itachi Nii reached the training ground after the massacre. But he was surprised to see Izuna with me.
"Hina what are you doing?"
"Itachi Nii we don't know will we meet each other again. This is the last favor I am asking you. This girl here you like her didn't you?"
Itachi Nii didn't answer
"I will take that us yes. She also loves you. My request is to use Tsukuyomi on her to show, how you guys would have lived if there was no clan massacre before you kill her. In your absence, I will take care of Sasuke"
With that, I left them alone.
Izumi Uchiha before her death," Thanks for the vision I longed for all this time. I love you Itachi."
.....
Scaring Danzo
"I will be watching you. If you touch my younger brother I will leak all the high-level intel to the enemy Nation"
...….
Report of his last mission
Third Hokage, "At last peace was maintained in the village but I really regret that there is no other way"
Itachi Nii, "I'm sorry"
Third Hokage, "I am the one who should apologize"
Itachi Nii, "Lord Third will you swear that you will protect sasuke."
Third Hokage, " I will not be able to erase his hatred towards you"
Itachi Nii, " I am prepared for his hatred"
Itachi Nii, " If you were worried about sasuke you can sneak in any time. And also keep an eye on Akatsuki"
With that Itachi Nii left the village.