Shinobi's Life: A Naruto reincarnation fic

Throughout history many humans have experienced reincarnation. They all had the pleasure to be sent to their favourite world. It should naturally be a wonderful thing, right ? Well it's not the case for someone who just doesn't love anything. Someone who's bored by everything and decided to end his own life. Sadly it seems that no one cares about his desire, and that's why he's suddenly thrown into a world that he despise. He didn't get any special ability, he doesn't even know when or where he was sent, but there's one thing sure......He's not going to let those fake ninja mess with the world. Watch as Koro becomes a true shinobi and try to finally live a life that he deem worth of being lived. ******** Warning: This story will be really dark, which is quite obvious since it's about a world filled with assassins, child trained to fight ( not really to kill) and useless leaders. Also the MC won't be OP at the start. He has nothing and doesn't even know how to fight, but he will train hard to survive. The world of Naruto will know some changes, but they will be shown in the story. Also keep in mind that this is a fanfiction, and as such it's only normal that some things will be different. Finally, just keep in mind that the MC is bored all the time, doesn't get emotionally attached to anyone or anything and that he despise the Naruto World.