Demon Slayer: Kill Shang Xian Si First at the Beginning

The protagonist Su Chen is an otaku who loves to watch anime. One day, he stayed up late to finish the Seven Pillars of Demon Slayer training chapter and the manga. As a result, he accidentally fell asleep. When he opened his eyes again, he found that he was in the world of Demon Slayer, but he came to a time more than a hundred years ago in the storyline, and was also involved in a battle with Shangxian Si. Su Chen: Just watch me refine it instantly. Su Chen: Isn't it just to save people? I'll save them. Su Chen: A mere evil spirit dares to do whatever he wants, but I'm going to string my strings, kneel down! (Stay close to the original work and try to save people on the basis of the original work. You will not become invincible so easily) (The author is almost a freshman, so please forgive me for my poor writing style)