I am Sarutobi Ren with a System

Kudo Ren was a normal college student who tried his best to score nice Marks on exams and studied even during his free time to get a good job . His normal life's dreams were shattered by a sudden bolt of lightning which struck his house and through his computer wires electrocuted him thus he died . He met a completely unexpected situation when he woke up again because he found himself sitting with a God who said that Ren's death was his mistake as he failed to control the direction of the lightning bolt and it somehow traveled to planet earth and caused Ren's premature death . Ren being avid fan of Naruto series , agreed to the compensation which was reincarnation in any fiction world with a system to help him become strong. After that Ren woke up inside the body a 12 year of Sarutobi who shared the same name as him . From here the story starts about Ren's great journey to gain pinnacle of strenght in ninja universe and the changes he brought to the story on the way..