Plugged In: I got Isekai'd into a Sexbot (Now I Must Save The World) - Chapter 6: Bringing the passion to pasture.

Leo used to be an affluent rich young master, who fell in love with a foreign beauty and after a night of passion, they got pregnant. The young man returned home to discuss the issue with his family only to be struck by a tragedy that changed his life completely.After eight months of laying in the bed like a vegetable, he woke up because the Almighty Father System selected him as a host. From then on, Leo's life changed once more, but this time, it was not the world that flipped him over, but he was the one who flipped the world upside down.Would you like to read about the story of a vegetable rising from the brink of death and becoming into a godly existence who slayed gods, and demons only so that he could bring a smile to his daughter's face? Come along then.

What is a genius? Capable of comprehending any battle skill regardless of the skill itself and sweeping away the bottlenecks while cultivating a new technique; this is a true genius! He Yiming was originally an ordinary youngster in the He family’s estate with not too extraordinary aptitude in learning martial arts.

There is luster in the east, and it is named Dahuang. “
In the rumors, ignorance, poverty, backwardness, and wildness. “
– bullshit. “
Queen of the Great Desolation, cold as frost. “
Supported by the national teacher, and the golden boy and jade girl of the national teacher, they are deeply in love, a stunning couple, and unparalleled. “
– bullshit. “
The queen died suddenly, and the national teacher mourned. According to the instructions of heaven, they traveled thousands of miles and finally found their reincarnated lover. From then on, the prince and princess lived happily in the castle…
——Crap! “

- Description from novelbuddy

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates