Not an isekai, but it does have isekai elements. I think the villain might be transcendent. MC reads a book that ends up being a prophecy for her future. She decides to change her behavior and run away before her perceived father, the emperor, kills her for being a fake princess.
MC has lived a long full life as a sorceress and decides to pass away. Instead of dying, her magic turns her into a youth again. She decides to go underground and try to fulfill her life wish and find true love. However, her disciples have lost their path since her reported death, and she must bring them back together to defeat the ultimate evil
I’m treating this as a one-shot because it looks like everything got resolved within a few chapters. I can’t say much without spoiling the whole thing, but it’s fast paced and fun.
BL! MC, once the only heir to the kingdom, is now a slave serving his childhood friends. But not everything is as it seems! MC has a brain parasite that is eating up his memories and political intrigue is afoot when the ML comes back from war.
MC’s family is in debt to a cousin, who is a jerk, and wants to marry MC. ML sends his butler to propose at the same time. MC accepts ML proposal and now they’re trying to get to know each other. Though ML looks like he erased MC’s memories of them both
MC realizes after her husband's death that she's been reborn into a world as a fallen noble NPC. Now she has to use her wiles to save the estate.
There Is No Place for Fakes