Skeleton Knight, in Another World - Chapter 21Volume 2 -

As a walk-on, he had been the mistress of his sugar daddy for three year. However, they only had met each other for a few times.
As a boss, his sugar daddy had tons of lovers.
The walk-on: The cake shop is the only thing I love in this world. Lovers? Never want one.
The boss: No problem. Nobody wants that.
Then, they fell in love with each other…
Shameless playboy x heartless rogue
1v1, this is not a decent love novel.

- Description from Novelupdates

Before Feng Yi ascended the throne, no one wanted to marry him, an unexistent and unfavored prince. After ascending the throne, the harem was filled with the daughters of important officials in the court.

Looking at the hurt eyes and feeling upset, it is fortunate that they all feel that they have dirty their own dragon bodies.

He decided to choose a hot-tempered, arrogant, domineering and jealous woman into the palace, and put all these rubbish in the cold palace for him.

Song Yunzhao traveled to ancient times for 14 years, and has been developing obscenely. He just waited for the plot to start, and then turned into an arrogant, domineering, vicious and jealous villain. When he was defeated, he could choose a husband and live happily.

Later, Song Yunzhao looked at the doting Majesty smiling at her and said, “Zhaozhao, come here.”

Song Yunzhao only felt that something was wrong, the soles of his feet felt cold, and the dog emperor had a gentle face and cold eyes, he clearly wanted to use her as a weapon!

- Description from novelbuddy

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.

‘Yoknapha,’ an international and well-known villainess actress, is suddenly transmigrated into a series she once starred in as ‘Bai Yu,’ a daughter of the senior chancellor. If this world follows the same plot of the story she knows, she will always lose to ‘Bai Hua,’ the heroin.

Nevertheless, if she loses this time, the one who will receive disgrace is not Bai Yu, but Yoknapha herself. That is why this time she will not surrender to the dreadful fate!

If it is determined that a heroine will end up with a hero in every love story, this one has to be different. She will be a villainess who gets to be paired with a hero herself. If wicked deeds bring what she needs, she will stay evil to the end!

That will be easier if a mysterious man Bai Yu does not remember exists does not appear and makes her heart pound like this!