Moon Lovers: Bound by Blood and Revenge - Chapter 2 Betrayal

Bai Aoxue, the best mercenary in the 21st century, is accidentally sent back to the Chengxi Dynasty in Great Continent due to an explosion in her mission, and trapped in the first daughter of Prime Minister. After her rebirth, she is set up by her father to marry the 5th prince Jun Yeyan who wears a mask all day long.
In the face of bloodthirsty enemies, discord between brothers, collusion among courtiers and invasion of enemy state, can Bai and Jun resolve the crises? What will happen to their political marriage? How will the fierce battle for the throne end?
With many twists and turns, the book brings you to experience palace revolution, love and hatred thousands of years ago.

- Description from Novelupdates

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

When he first crossed over, Chen Liguo did not want to accept it.

In her previous life, Su Nuan was set up by her lover and sister, and died tragically in prison. When she woke up, she had been reborn to a time before all the tragedies had happened. At her birthday party, her sister found some kidnappers kidnaping her, trying to destroy her innocence and get her kicked out of the house. Not only did Su Nuan mess up her sister’s plan, but she also dealt with all the kidnappers.

She also rescued Mo Ting, the most powerful and handsome man in City A. To stay away from her cruel sister and hypocritical scumbag of a lover, she relentlessly clung to Mo Ting. “Uncle, for my poor sake, please help me. I’ll do anything you want.”Mo Ting: “A contract marriage for three years. I’ll give you everything you want during that time!” At first, Mo Ting thought Su Nuan was just a poor little girl who had been driven out of her home, so he helped her.

He was also using her to appease his family’s elders as they had been harping on him to get married. Later, his assistant came to report, “The principal of City A’s university is here. He wants your approval for your wife to participate in the international competition.”Mo Ting: “…Wasn’t Xiao Nuan a hopeless student?”Assistant: “Sir, Madam has blown up! The entire internet is kneeling and begging her to debut in the competition!”Mo Ting: “…When did she become so versatile?” Later, the assistant reported again: “Sir, someone from the National Medical Academy is here. They say they won’t leave if they can’t invite Madam to make an appearance!” Mo Ting: “…I must be dreaming. Go out and come in again. Let’s start over!”