One Night With A Mysterious Billionaire (The Heiress's Revenge) - Chapter 21: Sack letter

This novel is about the young master of the Du clan, Du Shaofu, who was born with crippled veins and is unable to cultivate martial arts . After finding out about his situation from the clan while returning home he got hit by a lightning and a mysterious ‘first scripture’ appears and after studying for ten years he was able to mend his crippled veins together and starts his journey to glory.

- Description from Novelupdates

I was walking to the convenience store and the next moment I knew, I was inside the villain's body!?What is going on!?This world is known as the world of Star Fantasy, a popular RPG that dominated the gaming charts. Tournaments were held all over the world to celebrate the success of this game.The top ten guilds were invited for every tournament to recruit new talent for their teams. Liam was part of the third strongest guild in Star Fantasy. He suddenly woke up as the son of one of the strongest knights in the empire.Arnold von Berkley, who will become one of the greatest villains in the story.He must find out if there are more of him out there. Was he the only one summoned? If so, how can he avoid his inevitable death? By eliminating his death flags!

At long last, Fu Zhi, the mysterious heiress who had developed countless technologies was given two guardians by the country! Initially, the Lu Brothers shut her out when she joined the Lu Family. However, after spending some time with her, they began to warm up to her and took turns showing their brotherly love for her by throwing money at her.

She shouldn’t have got drunk, so she wouldn’t have court the troubles.
She slept with a handsome man and would be sent to the police?
Oh, my sweet Jesus…
“So you just ran away like nothing happened after you slept with me?”
“Old jerk! Even if I had the initiative, it was you who took advantage of me!”
As a saying goes, the more spoiled a president gets, the more likely he becomes a scumbag.
An adorable ‘wildcat’ vs. a scheming frenemy.
This was a love rivalry between a modern Cinderella and a Big Boss.
As time flew, the world was like a fleeting show.
When they met again after several years of separation, he held her hand tightly and swore that he would never give her any chance to leave him again!
Finally, he asked her to marry him and pampered his cute wifey with his endless love.

- Description from Novelupdates