I Dragged My Fiance's Uncle off the Altar - Chapter 45 - Hello, Cousin-in-law!

“I hate this world. I hate everyone. There's no justice for the weak,”Once happy and carefree, Reign's life took a dark turn when he was kidnapped and undergone brutal experiments.These trials broke not only his physical body but also shattered his mind.In the end, his body couldn't withstand the ordeal, and he died like a pitiful lab rat.But death wasn't the end.He woke up in a new world as a corpse, armed with the Ultimate Mutation System.A system that enabled him to mutate and gain power in exchange for his own humanity.Determined to avoid being exploited again, he sets out to become a true powerhouse.He knew that being weak would only make him a target, especially now that he was a monster.“Kill or be killed.”That was his only option.

High-school student Koremitsu Akagi finds himself attending the funeral of Hikaru Mikado, who had died in an accident during Golden Week. He’s not sure why he’s there, as he only exchanged a few words with Hikaru at school. However, Hikaru doesn’t seem to be completely gone from the world, as he comes back as a ghost in order to fulfill a promise to Aoi Saotome, his fiancée. Since Koremitsu is the only one who can see him, he asks him to carry out his promise in his place.

Complying with his request, Koremitsu tries to fulfill Hikaru’s promises to the rest of his “girlfriends”, helping them overcome past misunderstandings and repair broken relationships.

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!