I got this idea when I was reading through stories and summaries.
The Lost Uchiha
Chapter 1: A New Beginning
Itachi ran as fast as he could, he stopped near the border of Sunagakure, where there was a small house. Itachi looked at his baby brother, Mizuki, and walked up to the small house and knocked on the door. A man who had a spiky red hair answered the door, he looked down at Itachi.
"What is it, Itachi?" the man asked.
Itachi looked into his little brother's onyx eyes and looked up at the man, he handed Mizuki to the man.
"What is this, Itachi?" the man asked.
"A baby, Kenishi." Itachi replied.
"I mean, why are you giving it to me!" Kenishi asked.
"You said you lost your little brother, right?" Itachi asked his old friend.
"Yeah, why?" Kenishi asked.
"Want a new one?" Itachi asked.
"What?"
"Well, my father doesn't want the baby and he wants to kill him!" Itachi explained, "My mother said to give her away and I thought that you had a little brother, I'm giving him to you and don't tell him he's an Uchiha."
"Alright, Itachi." Kenishi replied.
"Thanks, Kenishi." Itachi said and took off.
Kenishi stood there taking in everything. How am I gonna take care of him? Wait... I don't even know her name!
"ITACHI! COME BACK! YOU DIDN'T TELL ME HIS NAME!" Kenishi yelled out. Mizuki began to cry. Kenishi looked into his onyx eyes. "I'll call you Ushiro."
Mizuki smiled at the man holding him.
"I guess you like that name!" Kenishi said, "Ushiro Narigami!"
Ushiro, who use to be Mizuki, laughed and went to sleep. Kenishi walked inside to show his mother Ushiro.