Multicrossover: I Took Utaha's Virginity At The Beginning! - Chapter 1: word filler

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

Nijigen is a freshman and Banri’s friend. He gains his nickname at the tea ceremony club’s welcoming party after declaring his despair of the three-dimensional world and that he would live for the two-dimensional world from then on. His nickname in high school was “Satoutaka”.

“Sarah, I promise to help you rise again, to bring back the light to your career and take down whoever shall stand in your way, but in exchange, be my wife” Mason whispered.“I... I appreciate your offer, Mason, but a contract marriage? Can we really keep it a secret?” Sarah returned reluctantly.In the aftermath of a heart-wrenching betrayal, Sarah Chen, the esteemed songstress of Wuhan, crosses paths with the Mason Liu. Heir to Asia's most influential dynasty, Mason, with promises of restoration and secrets, proposes a contract marriage to Sarah in exchange of helping her bounce back to her position as number one of Wuhan. As she hesitantly agrees, will Sarah find not only a path back to stardom but also an unexpected journey of love and self-discovery in Mason's perfect world?

Ling Xue traveled through the fantasy world and became the villain.At the beginning of the story, he gained an extraordinary ability linked to the consciousness of the number one heroine.The stronger the heroine imagines him to be (only on the surface), the stronger he becomes (In Reality).The heroine perceived Ling Xue as an enduring force, an invincible golden spear. She believed that Ling Xue has reached the pinnacle of cultivation and can achieve the highest realm.…So far, Ling Xue has only pretended to be imposing, leaving the rest to the heroine’s imagination…