Toaru Majutsu no Index: Genesis Testament - Volume 3, Chapter 3: Academy City’s Greatest Taboo — Safety_Zero, Control_Free.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

Blake, a pro gamer and the winner of the Zetron gaming competition for the MMORPG Lord of Legends meets his doom together with few other participants or so he thought.

Together with others, Blake gets summoned over to a world of fantasy and magic filled with danger and mysteries.

However, to go back, they have to fulfill the job of wiping away a foreign civilization that threatens the existence of both the infinite realm and earth

Forced to bind the cannon fodder system by the Lord God, Mu Yunge was abused to the point of doubting her life, and she vowed that one day she would counterattack the Lord God and avenge him!

But after her anti-control system returned to the old world, whenever her acting skills exploded and she was about to torture the hero and heroine to death, there was always a strong villain Boss, who frantically expressed her love to her!

The villain, I’m just a cannon fodder, okay? Please let go!

In this regard, the villain said domineeringly: You have only two choices, be my daughter-in-law, or let me be your husband! Other than that, you have no choice!

- Description from novelbuddy

Due to the machination of her boyfriend (Yi Jinxi) and “bestie” (Zhong Yi) , Xu Luosang who used to be a noble lady of a rich family was reduced to hiding her identity in order to rise up again. Her fiance put her father in jail and all that love turned to hate. So she lies about her age, hides her beauty and starts working as a carer in order to regain her power so she could save her father.

Our story begins with her nursing Nian Junting, a high-handed and narcissistic president, who suffered an accident and is unable to move and also unable to get it up. Being a man-child, the words he says are always the opposite of what the other party wants.

She thought their relationship was nothing more than a deal, so she left continuing her plans in her revenge, but time proved that he really loved her. He kept pestering her shamelesly, even obtaing a marriage certificate. His righteosness and fairness charmed her in time…..but will he make her fall in love again?

His sister: “Luosang must have reaped a significant amount of bad karma in her past lives to have been fancied by her brother.”

Him: “If I make Zhong Yi fall into the water every day, will you kiss me and feed me every day?”

Luosang’s mouth corners twitched slightly. ‘Really? Are you jealous of a dog?’

- Description from Novelupdates