Toaru Majutsu no Index SS - Volume 2, Chapter 21: Those with an Undetermined Identity. The Second Friday of October.

Ye Sui has been transmigrated into a book and became the venomous villain. And because she looked a little similar to the white lotus female protagonist, she was regarded as a replacement by the male protagonist. Ye Sui was also married to the main character’s third Uncle, Chen Shu, who was jinxed to ruin the life of whoever marries him

Immediately after she got transmigrated, she became the malicious and conceited villainess with a husband named Chen Shu, who was about to divorce her. Ye Sui could see ghosts, however, as soon as she touched Chen Shu, the ghosts would disappear.

Chen Shu, who was preparing for divorce,was shocked upon his return to his home. As his wife suddenly hugged his thigh and begged, “No divorce, even if you beat me to death I will not sign the divorce paper.”

Chen Shu: “…”

It was rumored that Ye Sui has a hard life. She married Chen Shu, a good for nothing husband who escaped death at the age of 30. But this sickly husband of hers actually had tens of billions of dollars in wealth.

Ye Sui almost believed that her life is doomed until she slowly realized it.

Her husband is omnipotent and the family is getting richer and richer.

That Tea is actually a priceless antique tea..

A replica vase in Tang Dynasty was actually authentic…

She soon found out her husband, Chen Shu, was a super rich and invisible wealthy man.

“I can clear all your debts, but you have to substitute me in my marriage…”

When Liang Dou Kou was diagnosed with cancer, she formed a contract with Qin Zhi Ai to substitute her in the time she would be absent, including her marriage with Gu Yu Sheng.

Initially, Qin Zhi Ai suffered under the cold and harsh attitude of Gu Yu Sheng, who mistook her for Liang Dou Kou. But his heart gradually softened and he fell in love with her.

Just when he thought that he could live happily ever after with her, it is time for Qin Zhi Ai and Liang Dou Kou to revert their identities, and Qin Zhi Ai evaporated from Gu Yu Sheng’s life.

Months later, Gu Yu Sheng meets someone who possesses the gaze of Qin Zhi Ai who captured his heart…

- Description from Novelupdates

After three years of hidden marriage, she has always been well-behaved and obedient, and she never made a fuss when she saw him having an affair with others.

On the day he Bai Yueguang returned to China, she silently handed over a divorce agreement.

He asked in a cold voice, “Why, do you have someone you like?”

She smiled lightly: “Yes, if you don’t admit that I am your wife, someone will always admit that I am his lover.”

Later, she was recognized by the Xie family and became the daughter of the Xie family that even he could not afford.

Seeing her doing well among men, Gu Jinmo realized that the love roots she had planted in his heart during those three years had already grown into towering trees, imprisoning him for the rest of his life.

- Description from novelbuddy

When Li Shen’s second personality acts out, her consciousness is sent to a strange place called Split Zone No.13. She is then informed that she can only return home after unraveling the truth.