MTL - Great Voyage: Invincible From the Era of Rocks - Chapter 343

The real hardcore player, who chose the most difficult start in “Reality Online”, still has to shock others with his god-level operation.

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

Kurogami Ichiro was desperate because he couldn’t achieve what he wanted when he once started his martial arts path at age of 8!

My name is Lü Jincheng, there are quite a few who have seen my works, and they call me Boss Lü.Before he had time to properly say goodbye, the top player Boss Lü is reborn in 2014, back to his youth.Suddenly equipped with a masterful skill in wooing women, his career becomes effortlessly successful.In a hedonistic life, there remains only the desire to do as one pleases.This book is also known as 'How to Break Free from the Shackles of Intimate Relationships' and 'Boss Lü’s Life is Destined to be Without Regrets' among others.