Becoming evil makes you ten times stronger, but becoming a demon gives you hundredfold strength - Chapter 64 - 56: Return

Su Wan is a Realm Destroyer. She shuttles to different time-spaces using the identity of the “Cannon Fodder Ex-Girlfriend”, dedicated to plotting how to happily tear apart the male protagonist and the female protagonist. –There’s no such thing as protagonists who can’t be torn apart, only Ex-Girlfriends who don’t work hard enough~

Arthur got randomly transported to another world. Some people would find that terrifying, but not for him, who was tired of his old life; it was an opportunity.

And, after having bad luck all his life, the tide changed.

It was a world of magic where wizards fought side-by-side with their familiars. Arthur got summoned to be one of these so-called familiars.

He was furious. The thought of becoming a pet was not something he liked. Well, that changed when he saw who his master was.

A hot-woman. And, to make everything better, Arthur was inside the Frostpeak Magic Academy, which only had women students.

“This is heaven. All familiars are beasts, but I'm different. I'm a good-looking man inside a place filled with hot girls.”

When he thought his luck could not get better, he unlocked a system that helped him with everything. Of course, he used the system for a greater good, like getting girls.

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

After being adopted by the Su family for so many years, Su Yan had always been grateful to them for raising her.

Within the walls of her family, she was filial, kind, and did everything she could to please her family. Outside those walls, she and her fiancé, Huo Nan, were on par with each other. They were an immortal couple that was respected by all. She loved Huo Nan to the core and even gave up her kidney for him.

This continued until the real daughter of the Su family, Su Qian, returned. Huo Nan betrayed Su Yan and climbed into Su Qian’s bed. He even allowed Su Qian to wantonly frame her and disfigure her!.

Su Qian even slandered Su Yan for seducing her fiancé. The Su family believed her and insulted Su Yan with the most unpleasant words in the world. However, they forgot that before Su Qian returned, Huo Nan was Su Yan’s rightful fiancé!

After she was killed, Su Yan was reborn to her 18th birthday and started her crazy path of revenge. Step one, inherit assets worth billions; step two, kick the scumbag to his death; step three, personally slice her white lotus of a younger sister.

In this life, all she wanted was to live an ordinary life with her blind and lame husband. After all, this man continued to help her willingly in her past life even though she rejected him countless times while her dearest husband betrayed her so ruthlessly!