Supreme Casanova: Ultimate Harem System - Chapter 29: Achievements! Level Up!

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

Noir, third son of a “beggar noble,” lost his job and was at a loss, but fortune struck just as he was contemplating becoming an adventurer.

The senior code farmer Luzhou who caught the wave of rebirth went back to 2010. Lu Zhou said that since the Big Three could not be strangled in the cradle, he would overtake at the corner of 2010 and make a counterattack.

There is always a dream, if it comes true.

This is a story of peace of mind.

This is the daily life of a code farmer.

This is a note of a young man’s illness.

Internet 2010, Luzhou’s 2010.

- Description from novelbuddy

Within the dream of the dreamer, the one who was dreamed of awoke.