How I Accidentally Married a Billionaire - Chapter 42 -

William was but an ordinary man—until fate saw fit to thrust him fifteen years into the past. Yet, this was no mere journey through time; he awoke not in his own flesh, but in that of the third son of Duke Herne, the most formidable noble in the realm.Now, amidst the glittering halls of power, where smiles conceal daggers and honour is but a well-spoken lie, William must navigate a world where commoners are naught but dust beneath the boots of the aristocracy. In this treacherous game of deception and ambition, he must learn quickly—for in the world of the nobility, ignorance is a death sentence----------------------------Hear ye, my loyal readers… From this day onward, updates shall be limited to three chapters per day—no more!Alas, my quill grows weary, and my stockpile of chapters runs thin. The weight of silence presses upon this tale, and my passion falters…I ask but a simple boon—Golden Tickets and a flood of reviews! Shall this humble plea go unanswered?.

After a tear in reality pulls Kagari Shuya into a white room he discovers a futuristic interface for reincarnating in a different world. After looking through the different races and skills he unlocks a new race, Lucivault, a type of vampire with none of its characteristic weaknesses. All set to start his life in a new world, Shuya is confused to discover that he is enveloped in darkness. As it turns out something went wrong when he was transported and instead of appearing where he was supposed to, he appeared in an underground cave. Shuya faces untold dangers, runs for his life, before finding his way out of the underground world. After escaping he meets his Shishou and begins to learn to fight with a spear. There is also a cute black cat named Rollo.

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

A few minutes before her wedding, Jeslyn found out her soon-to-be husband was only after the benefit he would get by marrying her. Heartbroken and feeling betrayed, she opted for the only option available at that moment, which was to get into a contract marriage with whichever man she could find, or else her family's fortune would end up in the hands of her enemies. …“Mister, please, will you marry me?” She asked him.A man she saw entering the restroom of the wedding venue. 'He must be one of the guests,' she thought.Maverick was taken aback by that proposal. He saw her flinch when he turned to look at her. It was apparent she got scared of him, yet she composed herself, ready to dive into the mystery before her.“It will be a marriage contract. We will get a divorce after one year,” he heard her say.He also needed a woman for his brat, so he responded, “Deal.”Unbeknownst to her, she just made a deal with the sweetest devil that could ever exist. ...He is the nightmare of country M, a country where evil rules.She is the little bunny raised with love and affection. Hurt a fly? No, she had never done that before.However, forced to become the demon's wife, she had no choice but to shed her fake persona.What little bunny? Who said she could not step on a pianist's fingers with her heels and pretend like she didn't mean it?Ha, those celebrities want to play the pity card? Do they want to garner the sympathy of the public? Well, why again is she called a 'little bunny'? Isn't it because she was the best at acting cute?Did no one tell these white lotuses wanting to dive into her husband's bed that she stole his soul when she spanked his naughty son?....Drop by my discord to have a one on one discussion with your author-- Hassy_101.Link belowhttps://discord.gg/CswFCgc2