The Principle of a Philosopher by Eternal Fool 'Asley' - Chapter 7.2, Party Night

Satou Shiki a Japan present-day university student suddenly one day he got attacked by a slasher when he open his eyes he was already transferred to another world’s labyrinth city. In that another world he who was awakened to do a lot of “things”.

Her wedding had also become her funeral.
Her stepsister and her fianc�� had gotten together at some point in time. It turned out that they had been the ones who had done it all along. She had been disfigured, raped, plagiarized, and her father had died in an accident.. All of this.. It turned out that they were the ones who had done it all.
She really regretted trusting the wrong person and misunderstanding the person who loved her... ...
After being reborn, she returned to her high school days.
She became a Straight-a student, won a grand prize, fought against the stepsister, confessed to the scumbag, and got lost. Her sister's lies were all broken. Faced with the shadow of rape, she came to recruit them. The chicken was braised with mushrooms, and a grand party was held. She made a name for herself. She was strong. She opened a shop, bought land, and earned a lot of money to be a boss But in front of him, she was a little woman that he doted on.
"Hei di, madam ran out again. She said she wanted to earn a lot of money to buy milk powder. "
Blue veins popped up on the man's forehead. "Here it comes again. Bring her back and open a bank for her. "

'Death' It was meant to be the end, but it brought a new start.After a destructive nether storm consumes his world, Jack finds himself face-to-face with a powerful being who tasks him with a mission he can’t refuse.Reincarnated as Asriel—the most tragic, doomed character from a novel he once read—Jack’s frustration grows: “Damn it, why this fool?”Now, he must navigate Asriel's cursed life, facing relentless supernatural beings that threats him with a single hope:[Necromancy System Activated!][Ascend as the Ruler of the Undead!]But can Jack rise above Asriel's fate, or will he, too, fall prey to the shadows lurking in his new world?

Shaymon, the man who has achieved the apex of dark magic, is framed as being a Demon King and is killed.