Bizarre Rules: The Villainous Ghost Tamer

No System + no saintly protagonist + no harem + no wish-fulfillment + no brainless decisions + decisive and ruthless. Careful development + corruption + stockpiling resources + war between nations. If any of that bothers you, read with caution.

[Aliens Invade, The Netherworld Falls Into Chaos]

The ancestor of a city-dwelling ghostmaster clan, who lived in a courtyard compound, is reborn by accident.

From the start, he lives with the campus belle and takes in a beautiful CEO.

He embarks on a path to invincibility.

That year, the Day of Calamity has just begun.

The world's major financial conglomerates have yet to rule Blue Star,

and the alien armies have yet to descend upon Earth.

Lin Yuan is determined to raise the campus belle into the future empress.

[The Knock-at-the-Door Ghost's Rules for Killing]

One: When it knocks, if a living person opens the door, a battle begins immediately.

Two: When it knocks, if a living person doesn't open the door but is discovered inside, a battle begins immediately, and the Knock-at-the-Door Ghost is strengthened.