Contract Marriage with My Secret Partner in Crime - Chapter 27: Request

As a boss with space plant abilities in the apocalypse, Lu Yao once traveled to the future, became the director of a nursery school that was about to close down, and became a rare animal human on the verge of extinction.
The food she made at random can cure the genetic disease of the cubs in the welfare home. She punched the cubs’ scum fathers and scum mothers, and kicked the remarried families who abandoned the cubs.
It is such a good kindergarten successor dean, who is attracted by that single cool imperial marshal!
Since then, the barrage in the live broadcast room has become:
Imperial Citizen A: Dean A, I really want to marry.
A certain big black dragon: Shut up! This is your marshal’s wife!
CP: Dean Lu Yao, who is extremely protective of short-sightedness and loves cubs, X the imperial marshal Helanjia who loves Shang Yunxi more than cubs
Brief: There are no bad cubs, only bad big ones.

- Description from novelbuddy

It was only after Su Yayan's death that she realized that she was a malicious cannon fodder female character who became a scapegoat in a Mary Sue story.

Embarking on a journey through a mysterious realm filled with boundless dangers and boundless opportunities, Qin Ze, an ordinary soul, is imbued with an extraordinary system that promises unparalleled power and growth. With each challenge overcome, be it fierce battles against demonic beasts or treacherous schemes woven by cunning foes, Qin Ze's strength soars to new heights. This is a tale of relentless progression, where the protagonist's will to survive and thrive fuels his relentless pursuit of becoming the strongest entity in existence. As Qin Ze delves deeper into the secrets of this vast universe, he uncovers ancient legacies, forms powerful alliances, and faces off against the titans that once ruled the land. But amidst the chaos and bloodshed, he never forgets his roots and the promise he made to protect those he cares about. “Unrivaled Ascension” is a thrilling adventure of self-discovery, boundless potential, and the ultimate triumph of perseverance over adversity.

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.