Reincarnated as the Mastermind of the Story

There was a globally popular game called "The Legend of the Seven Heroes".Ren cleared the sequel of that game at the fastest record in the world, and thus he obtained a bonus special , no matter where he looked inside the game, he could not find the moment where Ren was about to give up the search, he decided to start playing the second round of the ,a notification message "Do you want to start a special story? appears on the Ren chooses "Yes" without hesitation, he loses consciousness, and when he wakes up, he was a baby. -Could it be that he was reincarnated as one of the hero in "The Legend of the Seven Heroes"?Ren, who thought such a thing was impossible, could not believe his ears when he heard his name from his mother's was the name of a classmate who betrays the heroes in the middle of the course, he wishes to live in in the game, he meets a saint whose life he's supposed to take, and doesn', he ends up saving a character (the boss of a great noble family) who was supposed to of these things creates a development that he doesn't know about coming to play