Re:Zero Kara Hajimeru Isekai Seikatsu - Chapter 95Arc 7, - “Enemies on all Bastions”

In the legends that were told, ten thousand years ago the twelve demon kings wreaked havoc upon the world, almost completely destroying it. Ten thousand years later, the late arriving Bella discovered that she had been screwed over by her reincarnation, the ranks of the Saviors are already filled and she has to change teams in order to pass the days. Having her gender changed into a beautiful girl… she endured that, not being able to join the righteous side and obtain cheat abilities… she endured, but what she could not endure, was that the world that she had transmigrated to was toxic beyond belief. No one here does their rightful jobs properly, be they heroes, demon kings, or creator gods… in fact, Bella felt as if they all had also started with the wrong faction!

When an era came to an end, various forces set foot in cultivation to compete for immortality. A young boy who spent most of the time sleeping got lucky in the troubled times and became an unparalleled immortal who could cover the sky with a snap of fingers. Was he going to live forever?

- Description from Novelupdates

An 18-year-old poor college student tried to apply for a job as a tutor but his life almost ended as demons' meal. In his last breath, a mysterious woman gave him a strange power. When he opened his eyes he had turned into a demon with a system that would turn him into… A pervert.

Now he must lived with his dual identity as a model student named Ethan and an incubus named Damian.

She was the illegitimate daughter of a wealthy family—abandoned by her father, oppressed by his legal wife, and humiliated by the so-called sister. She watched her mother perish in a raging fire and was thrown into the flames herself.Her name was Janice. And she died in that fire.Ten years later, under a new identity and the name “Janet,” she survives in silence. Forced by her stepmother to marry a wealthy heir rumored to be “paralyzed and disabled,” she becomes entangled in a vicious struggle of family betrayal and ruthless power games.With cold eyes, she watches the hypocrites who once trampled her into the mud—one by one, they will become prey on her road to revenge.Her wheelchair-bound “husband” Philip, the feuding brothers Charles and August… But what she didn't expect was that the boy who once quietly handed her a handkerchief all those years ago would become the most unpredictable piece in her game of fate.She has returned—not for hatred, but to personally end the past that was once crushed beneath their feet.