I Reincarnated on Earth, But Got Summoned Back to My Previous World

Fidel Alimoren is an ordinary seventeen-year-old high school student that people wouldn't likely remember or even notice the existence of in the first place. He lives a very unremarkable life in school while being labeled as a lone wolf by his classmates due to his standoffish and indifferent attitude. But underneath all of this, he actually harbored an extremely unbelievable secret that he hid from everyone else that not even his parents knew about. A secret so unbelievable that people would think that he was crazy if he ever decided to reveal it one day; the crazy secret that he was a real and true reincarnator that came from another world. And due to a certain turn of events, he was summoned back to his previous world as one of the Otherworldly Heroes that would fight and lead humanity to victory over all the other fantastical races of the world. This is his story of how he will finally end the millennium-long war once and for all while finding a way to return back home to Earth afterward. Disclaimer: I do not own the awesome cover art so if you are the owner and want me to take it down or, if you're a cool person who just wants me to credit you for it, then please leave a comment to let me know. Thank you very much.