MTL - Cultivating From Obtaining Experience - Chapter 254 this cannot be explained by science

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

In the depths of a newborn universe, a cultivator takes advantage of the abundant energy to refine himself a treasure. But after 14 billion years of refining and quite a few more to go, he decides to entertain himself by releasing countless systems and watching how the creatures of this fledgling universe handle them.

On Earth, a young man, lost and confused about what to do with his life, sits in a park and looks up at the night sky. A shooting star, a wish and a bang. When the boy finally wakes up he hears a sound, "assimilation complete. Launching System. Welcome to the Midnight Inn. Host Designation: The Innkeeper."

The magical girl who made the wish of “destruction of this world” came to Ke Xue’s world, and Kewpie became a little Kewpie.

Being chased by someone holding a knife at the beginning, Shuangyue fell silent.
In a world without witches, how would she purify her soul gem?

Originally, he just wanted to be a good and hard-working employee in the winery, but the old man always liked the whole brainwashing operation. Suppressed by the world consciousness, for her own pure land, Shuangyue decided to go to his red square and black square, she would smash the dog world consciousness.

The protagonist is not a good person (highlighted), the three views have been distorted in the magic circle world, not a red square.

Little Cupid: You are my magical girl, and I am your Cupid.
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Rescuing Matsuda Cat and Jingguang Cat, the protagonists directly built a gray empire for Jin Jiu and Sister Bei.
Hagihara and the squad leader are still dead, because the protagonist was not there at the time.
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Do not dismantle the original cp, bring your own cp (but there is no obvious emotional line).

Content Label: Teen Conan
Search keywords: Protagonist: Frost Moon Saya ┃ Supporting roles: Gin, Zhufu Jingguang, Matsuda Jinping, Edogawa Conan, Maorilan, Kayao (Shirazawa Nozomi), Little Cupid (Ruby) ┃Others:

- Description from novelbuddy

Chu He transmigrated into a barren world as a lowly odd-jobber in the Xia clan. He had initially accepted his fate and was ready to spend his life ordinarily and peacefully. Little did he expect himself to suddenly awaken the Checkpoint System which rewarded him for checking into places!

Ding, congratulations to the Host for successful checking-in. For your first check-in, your reward is the Golden Nine Turns. Ding, congratulations to the Host for successful checking-in. For your twenty-one-thousandth check-in, your reward is the Golden Manifestation of Buddha’s Form.

Chu He was certain that the world outside was too dangerous, so he resolved to not leave the book depository until he became truly invincible and peerless, and thus he stayed for a hundred years. A hundred years later, the Tiger clan attacked the Xia clan and planned to massacre countless humans, it was at that moment that Chu He finally showed his hand!