Manato Tsukasa is one of the top tier players of the game, Alternate World. After being humiliated countless of times in the game, he became a professional top tier Magic Knight player. When he was about to get married to the woman he is engaged with, he discovered that he she was tasked to do so.
After desperately escaping death, he encountered a similar person in the alley, bloodied and out of breath. Manato recognized this person to be the creator of the game, Alternate World. The creator then handed him out an item that will return him to his past self, hoping that he will be the one who can change their destiny. He was also entrusted to travel back in time with a peculiar data that can only be accessed back in the past since he is already dying. Desperate to survive, he grabbed the item and decided to return.
He woke up once again, in his 17 year old body where the game is still launching. In his hands, is the weapon entrusted by the creator that has been transported with him. With his photographic memory and the data in his past, he won't just go down easily and he will use this chance to stop everything that happened from repeating itself. He won't trust and promised to destroy everything that will cause his demise.