Strongest Survival by Otome Game’s Heroine (LN) - Chapter Volume 4 10: Iron Rose

In Heaven’s Vault Continent, Colossal Dragons, Titans, Beast People, Fairies, Magical Beasts, and other races reign supreme!

Yan Lan follows her mother's dying wish to hide her countless identities and live a low-key life.Who would have thought that one night, her sister Yan Xue has a dream about a broken wealthy family, and upon waking, steals her beloved and forces her to go on a blind date in her place.Yan Lan: Go for the blind date immediately, the match is the prince of the capital's elite circle.The sister waits and waits, expecting Yan Lan to follow her old path and become an abandoned wife of a wealthy family, but finally she receives news...Late at night, Yan Lan returns home after a quarrel.The former true love: Brother, I have a stomachache, can you come to see me?The new wealthiest and prince: Block and delete in one go, don't disturb me while I pack my small bag to sleep on the floor at my wife's place!

Xiao Yu, who was a student from modern Earth, accidentally transports to another world and becomes the lord of a territory. Facing an unfavorable situation, he vows to take back his family business, build his new territory, kill all of those who covet his wealth, and dominate the world!

- Description from Novelupdates

The formless ancient world was infested with despicable demons. They hunted and feasted on mankind, keeping the human civilization constantly in a weak and suppressed state.