Rebirth: A Cat with a System - Chapter 17 Four King’s

Lee Jin Woo once lived a dismal life.
He lived pitifully on a day to day basis in his five-pyeon studio filled with mold.

Then, one day, he died in a sudden fire.

When he wakes up, he finds himself inside a novel.
But there’s just one issue…
He had become the novel’s villain!

A Mysterious continent, with many powerful sect and countless strong one. Juvenile Zhou Heng with a mysterious black broken sword, from the original stone town out into this world of war. Ascended the throne of the world with only a sword in hand.

- Description from Novelupdates

[R18 novel with a lot of sexual content]Artem never expected to take on the role of a villain, let alone transmigrate between harem novels. Bound by a system, his task is clear: steal the heroines from all the protagonists’. From Chinese Cultivation and Korean Gate to Japanese Isekai Fantasy, VRMMORPG, and beyond—no heroine is off-limits, and no protagonist is safe!

In her previous life, Fang Qing’s parents passed away one after another, and she herself died tragically in a dark mental hospital.

When he opened his eyes again, he accidentally returned to the time when he was seven years old.

This time Fang Qing was cautious and vowed to change the fate of himself and his family. She studied hard to get ahead, and by the way, she won over the handsome boy next to her who was always blushing.

- Description from novelbuddy