Lee's kekkei genkai lets him possess other people to extend his life. Living for hundreds of years, he became a master of chakra. So when he possessed a deformed body that couldn't use ninjutsu, he knew he had to leave immediately. Problem was, he'd have to open all eight gates to do that... oh well. He might as well have fun in this life before he left it. AU. OP!Lee.

This Naruto world actually makes sense. Ninja are human beings with their own backstories and faults. There are no heroes or villains, only those fighting for their own causes. I witnessed all of this, because I was reborn as Neji.