It could be a rogue ninja from another village who has a vendetta against Naruto. This ninja might have set a very elaborate trap that made it seem like Naruto was killed and left his body in a place where his friends would find him and think he was dead.
Maybe Naruto is betrayed by someone within the village who sets him up to look like he's dead. Left for dead, he's found by a hermit who teaches him new and powerful jutsu. With his new skills, he plans to return to the village to expose the traitor and prove his worth once again.
Survival is a very common theme. Since the game is about fighting zombies to stay alive, most fanfics revolve around how the survivors manage to keep themselves alive in the face of danger. Another theme is teamwork. The survivors in the game need to work together, and this is often explored in fanfics.
I'm not entirely sure as 'left for dead lemon fanfic' isn't a very common or well - known mainstream concept. 'Lemon' in fanfic often refers to content with sexual undertones in some fanfic communities, but it could also be a very unique or niche story within the Left for Dead fandom that uses 'lemon' in a non - sexual or just a creative way. Without reading it, it's hard to say for sure.
He might survive through his own sheer willpower. Naruto has always been a tenacious character. So, even when left for dead, his determination to live and achieve his dreams could keep him alive against all odds.
Iruka Sensei could also be a candidate. He was one of Naruto's first supporters and has a deep connection with him. He would probably risk a lot to save Naruto.
Perhaps there was some sort of dark influence or mind - control at play. An enemy might have manipulated Kakashi's mind in such a way that he believed Naruto was a threat and thus left him for dead, not realizing his true self.
One possible reason could be a misunderstanding. Maybe they were misled by false information or an enemy's trickery that made them think Naruto was a threat at that moment. Another reason might be extreme pressure or a life - or - death situation where they thought sacrificing Naruto was the only way to save the rest of the team or complete a crucial mission.
Lemon fanfics often contain elements of romance or alternate scenarios. In the case of Zoey from Left 4 Dead, it could be about her dealing with a new survivor in a post - apocalyptic world in a rather romantic or different way compared to the game. Maybe she forms a special bond with someone that changes the dynamics of the group she is in.
I'm not aware of any specifically popular 'left for dead lemon fanfic' stories. Since the 'lemon' aspect might imply some rather niche or even inappropriate content in some cases, it's not likely to be something that's widely promoted or known in mainstream fanfic circles. However, within very specific and perhaps more permissive fan communities, there could be some, but I don't have any names to give.