One Piece: Fist of the World - Chapter 29: Bounty

Yun Ran, the successor of Qingfeng View, accidentally got transmigrated into a book due to a blunder.Even more speechlessly, she ended up as a character destined to die early.As the heiress of a wealthy family, not only was her luck and destiny stolen, despised by the heavens, but she was also backstabbed by her own mother, who is the female protagonist, becoming a stepping stone for the male and female leads' happily ever after - absolutely used as a tool.Faced with a disastrous start: No panic, she could simply revert to her old job, setting up a stall for fortune-telling - first three fortunes free, don't miss out as you pass by~Facing injustice and evil: Little ones, take this, descend heavenly thunder! Open the gates of hell! No petty person shall overpower me, all retreat!!!Facing random strikes of heavenly thunder: Hehe, can’t touch me; ancestors, someone is bullying me, come save me~~~Merely running a fortune-telling stall, casually saving people, occasionally undertaking tasks for some hard-earned money, she caused evil cultivators to flee, broke her peers’ defenses, and made wealthy families wary.Everyone heard that Yun Ran had a backing, the Xie family's notorious young master who 'kills people and is short-lived'.Some resentful and envious people kept waiting and waiting, not only did they fail to see Yun Ran meet her demise, nor the young master Xie pass away, but they witnessed Yun Ran amassing boundless merits, firmly sitting on the throne as the number one person in the mystic sect.And that Mr. Xie, unknowingly picked up the habit of making fortune bursts, remarkably living a long life through sheer spending.

This is a world where humans, demons and mysterious beasts coexist.

Humans cultivate mysterious qi. Demons cultivate corporeal bodies. Mysterious beasts cultivate soul perception.

A legend says that in the middle of an endless rainforest, there are extremely powerful existences; they are called demon kings.

Some demon kings have a tyrannical corporeal body, some are experts in illusions.
Some demon kings are proficient in magic, some can even move mountains.
Some demon kings are able to sense things thousands of miles away.

These demon kings rarely appear in the human world. Even if they emerge in the human world, they would reincarnate in human form; assimilating with mankind while seeking to breakthrough realms…

- Description from Novelupdates

Chu Xuan transmigrated to a fantasy world and became the young master of a powerful family. He was rebuked for misbehaving just because he sneezed during a banquet. As punishment, he was banished from the ancestral mansion and was relocated to a remote residence.

He did not mind the punishment at all. He just needed a spot that could allow him to be a shut-in. With the system that would allow him to grow stronger by being a shut-in, the longer he stayed indoors, the more powerful he became.

After being a shut-in for a day, he was rewarded with the Indestructible Body Technique.

After being a shut-in for a month, he was rewarded with the Immovable Mountain Technique.

After being a shut-in for a year, he was rewarded with the Yuxu Celestial Scripture and 100 years of cultivation.

After being a shut-in for 10 years, he was rewarded with the Chaotic Indestructible Body and the Bell of Chaos.

…

Chu Xuan declared, “No one can make me leave my home. I like being a shut-in!”