Akuyaku Reijou ni Nanka Narimasen. Watashi wa『Futsuu』no Koushaku Reijou desu! - Chapter 134.2: Best friend and request.

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

A master assassin transmigrates into an interstellar era.

Coming from one of the richest families in the world, everyone wanted something from her, and Cora felt she was never loved in all of her life. Desperate to find true love, Cora got married into a pauper she took a liking to and secretly helped him rise to the top. She pretended to be disabled and poor in order to prove to her family that he was a good man, but on the day she planned to reveal her identity to him, she found him cheating on her on their bed.Filled with so much rage, Cora vowed to crush him piece by pieces.Being this heartbreak. She vowed to never love again as well, but it felt like the world was waiting for her to be single because the moment she became single.Over a Battalion men wanted to marry her.

She breaks all the rules.When master thief Xavier Valentine died, he caught the attention of Calypso, the Goddess of Reincarnation who turned death into her personal gameshow. But rather than simply send him to a new life, she made an unprecedented choice:She followed him in.Now trapped in a world of magic until seven Primordial Gates are cleared, Calypso and Xavier form an unlikely alliance. He needs to level up to survive. She needs entertainment to stay sane. The prestigious Catalyst Academy needs them to stop causing chaos for five minutes.They're probably going to disappoint everyone.In a world where dungeons hold divine secrets and ancient gates lead to untold power, one thing is certain:This goddess isn't letting her favorite soul leave her alone.