Ghost Billionaire - Chapter 42: Life Force

Ever since she transmigrated, she was blessed with an inbuilt anti-poison detector.

Beep beep – What? Her father’s concubine was evil and her half-sister was vicious?
Beep beep – Ah! She was in an arranged marriage and her husband did not love her?

Who cared? She could kill those evil creatures instantly with her high intelligence.

Her unparalleled beauty attracted countless suitors and her popularity topped the charts. No one was immune, even the emperors and princes were all captivated by her…

- Description from Novelupdates

Baek Ain is your typical lazy guy.

He graduated from university at age 22 with a random degree he chose out of boredom and stayed single because fate decided so until that event happened.

“What? Where Am I??”

After a horrible incident, Ain transmigrated to another world. Or precisely to be a villainous and mobs character.

He died countless times because of the world's protagonists, gathering hatred toward them.

“What the fuck! What do you mean I stole your wife? I've been single since coming into this world!!”

“Hero, please save this world.” A goddess is begging me to save her world from the Demon Lord.

“Wait... Begone thot! That Demon King is my younger sister from 69th Transmigration.”

“How dare you!”

A beautiful heroine is hugging me from behind, wishing to accept her feelings.

“Shoo, Heroine! I don't need useless baggage with me. Side characters are better than you!”

And so, Ain's journey began to end this shitty transmigration cycle.

They stole his future and crippled his body. Now, he’ll rewrite the history in blood.Damon was on the verge of greatness—first in line to claim Bloodreign, the legendary artifact said to grant unmatched power in Earth Online, the world’s first fully immersive VR game. But his best friend betrayed him, stealing the item, and leaving Damon broken, crippled and nearly deleted. Kicked from the guild, mocked by the community, and trapped in a weak, crippled body, he was forgotten until his last desperate attempt somehow brought him back in time to the day when it all began.Now Damon was back and he knew what he was going after.A hidden lineage. A cursed class. A bloodline sealed since the dawn of the multiverse.Last time he played fair. Last time he trusted. This time he would hunt and devour. With years of knowledge of every exploit, every secret quest, every bugged mechanic, he will climb straight to the top. Armed with the blood of the first Vampire King, he was an apex predator now who stood at the very top.However, unbeknownst to him, a catastrophe lurks in the shadows. Damon finds out that the game itself might not be as simple as it seemed and the entire future of the humanity might depend on this game.

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.