The Undercover Heir is Actually Tycoon's Secret Girlfriend - Chapter 1: Third Young Master

This is the novel behind the TV series, “Love Like the Galaxy”.
The following synopsis is based on the TV Series.

“The young Cheng Shaoshang was left behind because her parents had gone off to fight in the war. In order to protect herself from her scheming aunt, she had to be extra diligent while pretending to be the opposite. However, years of estrangement have made it difficult for them to become family again.

Lacking love her whole life, Cheng Shaoshang is both pragmatic and insecure in choosing a partner for marriage. She encounters three men – the emperor’s adopted son Ling Buyi, the talented Yuan Shen of Bailu Mountain, and the aristocrat Lou Yao who each have their pros and cons. Although the road to love is bumpy, she never regrets every choice she makes. Through her interactions with Ling Buyi, she unintentionally becomes involved in the mystery surrounding his family and his identity. The two grow from their experiences and worked together, upholding the righteousness in their hearts to resolve a national crisis.”

- Description from Novelupdates

I banished the protagonist.

Shit. If only I had transmigrated a short while before.

She, the world's chief doctor of the 21st century, the legendary overlord of the medical world, was killed and her soul transmigrated…She, the useless miss of the Windcloud Empire, was ugly, silly, and obsessed! She died in her own sister and fiancé's hands…When she reopened her eyes again, she had the soul of the strong but the body of the weak…When she became her, her fate would be rewritten and a miracle would appear…This was a story of a two-faced person meeting another two-faced person. With pure hearts, they would end up together.

Leila's, the daughter of a powerful Alpha, is cast aside by her father after being born as his first child. Disappointed that she cannot inherit his title, he sacrifices her to settle a debt with a notoriously brutal rival pack. Sentenced to a life of slavery, Leila's is subjected to unspeakable cruelty, her spirit hardened by the abuse she endures.Driven by a thirst for vengeance, Leila's vows to reclaim her honor and seek retribution against her father and her captors. Her life takes a turn when she escapes her torturous existence and encounters her destined mate. He introduces her to a world of love, protection, and comfort—a stark contrast to the harsh life she has known.With her mate’s unwavering support and the skills he helps her acquire, Leila's transforms from a mild, innocent young woman into a formidable force. As she prepares to exact her revenge, she grapples with the darkness within her, ultimately seeking to quench her thirst for vengeance while navigating the complexities of love and power.'Turning Dark' is a gripping tale of betrayal, transformation, and the quest for justice as Leila rises from the ashes of her past to become a force to be reckoned with.