Reincarnated as a Slime: The Darkness Slime (Futa Oc x Female/Futa Harem)

(alright so this will be a Major Story kinda like I did to some of my finished stories it will be a Major because thank God season 3 is out and boy is the first two episodes are good best if you watch them cause I don't want to spoil anything I don't own the anime or the pics hope you enjoy this book) In this story Rimuru before she died she had a Sister who died before her a Year ago what happened to Luna and what if the siblings meet after a year.......