Beginning-
Moments after I said goodbye to Itachi, my little brother figure and best friend while I fell into the Naka River. While I fell I smiled softly embracing the darkness of death. Hoping my sacrifice wasn't in vain.
Opening my eyes I realized I could see as a strange white orb spoke in a feminine tone," Finally awake I see Shisui Uchiha."
On guard slightly I questioned," Who are you?"
The white orb laughed lightly," Oh no one important, you just know me as the Shinigami."
I could feel my face loosing blood," Uh."
The Shinigami laughed as she spoke," No worries, I have a proposition for you. I will say it now before you ask. I want to revive you in another world to help protect a group of kids. You will be going back to school but you will be keeping all your skills in your past life. I will seal your shinobi gear into a scroll. By gear I mean weapons of course. You will need them for what is to come. Do you accept?"
Thinking for a few moments I grinned," Sure I rather be alive then dead, also Am I still going to have my sharingan?"
The shinigami replied," Of course. Now I will be watching your progress. I wish you luck Shisui." Her orb glowed brighter as it blinded me instantly.
Opening my eyes I took note I was in different clothes but I could tell I looked the same. A man stood in front of the room as I sighed,' Great back in school. I wonder when the thing that Shinigami-sama warned me about going to happen?'
The door burst opened...
Shunshin no Keiji here a bit of the beginning for Shisui Uchiha in the World of High School of the Dead