Demon Slayer: Others Practice Hard, but I Am Invincible

(Animation fan + passionate + invincible + human side + respect for the original + single female protagonist) Suzakuji Anping is a time traveler who has traveled to the world of demon slayers. After encountering a ghost, his life changed because he awakened to a system superior to ghosts. As long as you encounter a ghost, you will be stronger than the opponent unconditionally... He is the natural nemesis of ghosts, after witnessing all the damage caused by ghosts. He just wanted to go to the ancestor of ghosts in person and ask him a question. "Kibutsuji Muzan, what do you think of life?"