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Shisui was saved by Itachi just in time, being taken away from the anbus led by Danzo, who had stolen his right eye.
“Itachi… I thought you were… on a mission…” he said.exhausted, while looking at Itachi. “I felt like something was wrong so… I decided to come back..” he responded, clearly worried about his friend.
“I'm glad…” Shisui said as he looked at him with a small, slight smile. “I'm sorry for the inconvenience…” Itachi only shook his head. “You need to rest Shisui-…” “I need to talk to you first, Itachi…” He interrupted, clearly implying that it was important.
Itachi nodded, understanding his friend. Shisui guided him to a cliff that ended in a river and turned to Itachi. "It seems that there will be no way to stop the clan's coup... Just when I was going to start the mission, Danzo stole my right eye so I can no longer use the Kotoamatsukami" he said.
“If the other villages find out about the Uchiha rebellion, they could invade us and it would be an all-out war… And that would have big consequences”...
He let out a small sigh before looking at Itachi. "Danzo didn't trust me to stop the coup so he will surely come for my left eye, that's why I will give it to you.." he continued as he took out his left eye and handed it to Itachi, who placed it in one of his crows.
“I can only trust you, my best friend. Protect our village and the name of the Uchiha..” “I have accepted it.. What will you do now…?” Itachi asked him, still a little worried. “Who knows if my death will change the situation a little… I have already left a note…”
Itachi's eyes widened in shock. “Wait, Shisui…-!” “Don't stop me Itachi…!” Shisui said, prepared to fall backwards, when in a second he felt slightly nauseous, falling to his knees before being picked up and held by hands larger than him.
“...Itachi...? Why…-?" "..I won't let you die Shisui..." Itachi interrupted before placing the ninja reduced to 4 inches into his mouth. He held him in for a few seconds before swallowing, feeling him go down his throat and into his stomach a few moments later.
Shisui let out a slight sigh as he settled into the warm, soft spot, leaning against one of the stomach walls. He didn't think Itachi would use that jutsu to prevent his death. He looked around trying to remember what his friend's stomach looked like, mostly because he couldn't see it since he didn't have the eyes to see, keeping his eyelids closed.
After a brief moment to make sure Shisui was alright, he quickly headed towards the Hokage, but not before picking up Shisui's note, since it would be pointless leaving it there if Shisui was going to survive. He explained the situation to the Third, who said that he would take action against Danzo and that they’ll regain Shisui's right eye.
After a few days they managed to recover Shisui's eye and transplanted both of his eyes back. With that resolved, Shisui was able to put his clan under the genjutsu they had planned to put on them to postpone the rebellion and be able to reach an agreement with them later.
//
The sky was clear and the breeze was blowing gently. Shisui let out a soft sigh as he looked at the sky, looking back when he heard someone approaching. “Hey, Itachi…” he said with a slight smile. The other Uchiha waved back and sat next to him.
"You know... You didn't have to go to the point of commit suicide, Shisui... Even if it was for our village and the clan..." he said softly without looking at his friend.
"I guess I was rushing into thinking that I couldn't get my right eye back and put our clan into genjutsu..." He paused for a moment and looked at Itachi sympathetically, knowing how he felt.
“...I'm sorry, Itachi…” This time he did look at Shisui, sighing slightly before giving a small smile. “Just promise me you won't do something like that again without considering other options, okay?”
Shisui gave a small laugh before smiling again. "Alright Itachi, I promise." He paused for a moment before looking at Itachi with a raised eyebrow.
“By the way, could you do the jutsu thing again? I couldn’t observe my surroundings well during that moment.” Itachi just laughed at the comment. “Okay, when would you like to?”