(idk what her Reincarnation name because i forgot so i named it rengoku)

You have to be reincarnated with all the hashiras and a few years ago all the hashiras managed to kill Muzan and they lost their lives and could be reincarnated again in the modern era and rengoku reincarnated Being a high school student is the same as you and you are in the same class as Rengoku and in that class you are the class president

"Sorry am late"