Manga wo Yomeru Ore ga Sekai Saikyou ~Yometachi to Sugosu Ki mama na Seikatsu~ - Chapter 2: The Grimoire’s Contents was Manga

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

Baek Yigang is a son of the Baek Clan, one of the seven great clans of Zhongyuan. Afflicted with the Taiyin Qi Blockage, he is cursed with a shortened lifespan and the inability to collect internal energy. He had been peacefully spending the rest of his days indoors when he was ambushed by a group of masked people. During the ambush, he lost his servant who was like a sister to him. Chased by the attackers, Baek Yigang escaped through a secret underground path. When he came across a blocked path, he decided he’d at least die fighting and picked up a rusted sword that was stuck in the ground…

The five different worlds of demons, demons, ghosts, monsters, and beasts descended on Blue Star in the form of dungeons.

Human beings will be randomly selected by the Heavenly Dao system and enter the dungeon in another world.

Su Qianqian, a cute baby in the senior class, was accidentally selected.

When Su Yang learned that her daughter was going to enter a dungeon in another world, she told her: “Don’t play for too long, and go home on time for dinner.”

Play? Do you think that the purgatory alien dungeon is a playground?

Just when the whole world thought that Su Qianqian was going to end, they were surprised to find that she really came to play.

In various dungeons of other worlds, the divine beast Qilin serves as her mount, a generation of demons kneel down and beg to be her full-time nanny, giant giants of the sky serve as her thugs, and the flower demon fairy goes too far, wanting to be her stepmother.

The whole world was shocked. Who is Su Qianqian’s father, Su Yang? ! !

- Description from novelbuddy

In the 1960s, resources were extremely scarce. Thankfully, she had a personal space filled with supplies, ensuring she never lacked for food and clothing.