Strange Tales of Rules: Taking Care of Roommate's Girlfriend at the Beginning - Chapter 37 – The answer is...

Welcome to the world that has shed its old skin.

It's an age of avant-garde technologies that break common sense. Science that transcends fantasy. And yet, it has lost its charm in the face of something even more fantastical.

The presence of mana is for those who are blessed by their origins. The Rankers are the true elites of their circles.

A long lifespan is possible. Gaining superhuman powers is feasible. But what use is personal power when the entire existence of your species is on the line?

Things on Earth are much more serious than the general populace is aware of. A threat of the unknown looms over the existence of everything living and otherwise.

Humanity may soon need to leave the only place it calls home. And seek shelter somewhere else in the infinite universe.

Who would find the Oasis for humans who have never been so powerful or as helpless as they are now? Will it be the hero they asked for? Or will it be the not-a-hero they need?

What happens when that not-a-hero gains one of the most broken powers?

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I am lost and found

In the world of dreams

My serenity awaits

Amid the banshee screams!

Within mayhem, I'll find my reason

Within sorrows, my bliss

In the darkness, I'll see my light

In the desert, my oasis!

- Grayback

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

As an ordinary human being on the earth, Tang Long was brought to the Cultivation World by a lost immortal, and relying on his amazing talent, he made it to one of the five emperors in that world. However, struck by Thunder of Nine Heavens, he lost his life. It was lucky for him to transmigrate in the human world in an intern who was named Qin Haodong. With his excellent medical skills, he became a divine doctor of traditional Chinese medicine and encountered the baby girl he made before going into the Cultivation World, whose mother was as pretty as a fairy. The little girl even asked him to find more lovers. What a cute girl…