Cyberpunk Patriarch - Chapter 75 - 74: Delamain’s Commission!

When Su Jiu dies on her eighteenth birthday, she transmigrates into a novel about painful love and becomes an adorable four-year-old child.

Bro, I mean, I'm just a tad handsome, a bit skillful, and slightly crafty, that's all! Why do you all have to make my life difficult? This incessant pestering isn't the answer, is it?What? You'll marry no one else but me? No...you...how could you? Without even asking for my consent?

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Tessy Brown, an only daughter of her parents, was treated badly in her marriage, but forced to endure all the ill treatment for the sake of her father's business. Three years down the line, her husband presented her with a pre birthday gift — his ex girlfriend, who he introduced as his new wife. Heartbroken and shattered, Tessy accepts divorce and gives in to her drunken desire, having sex with a complete stranger she met at her workplace.That single encounter changed her life forever, opening her to a world she never knew existed, and a life she never would have believed she lived in the past.***Cursed to abhor the touch of a woman after the death of his mate, Roman Gavriel, the Lycan ruler of the entire werewolf communities and a revered billionaire in the human communities, lived a long life of ruthlessness and loneliness.Already resigned to his fate, he decided to test different ways to end his miserable life. When one of his experiments successfully knocked him unconscious, he landed in the hospital where he felt the touch of life that aroused all of the feelings he thought he had killed and buried.At that moment, he knew he was never letting her go, not for anything or anyone in the world.