The Lord of Void and Real - Chapter 13 - 12 Stone Ball

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.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Yun Ran, mercenary queen of the apocalyptic world unexpectedly transmigrated into the ugly, stupid second lady of the Prime Minister’s mansion with two little adorable three-year-old kids. Adorable baby 1 was a genius poison doctor who had a photographic memory and was “unremarkable”.Adorable baby 2 awakened the ultimate spiritual root that only appeared once every thousand years. When he pounds the ground with his small fist, the ground would shake. As for her, she had a spatial pocket with treasures in it. She contracted an ancient divine beast and refined peerless divine pills!***

Just as Yun Ran was gearing up to experience the joy of beating up scumbags…Can someone tell her why these few bigshots suddenly appeared before her?! The top tyrant: “I have a throne that you should inherit when you have the time.” The cold-blooded war god: “I think you have the talent to be a great general. Look at the millions of soldiers I have…” The best royal merchant: “Come, I’ll let you taste the joy of being the richest woman in the world.” Sinister state preceptor: “I’ll stab and curse whoever bullies you.” A certain ghost king traps her in his arms and snorts coldly, “Close the door and release the demons. No one should even think of coveting my treasure.” Yun Ran: “???”***

Rumor has it that the ghost king, Mo Beiyuan, has a pair of ghostly eyes. He was born under the destructive lone star, was bad towards women and was the most messed up character in all five countries. Yun Ran not only messed with him, but also wormed her way into his heart.#He was once a demon in the darkness, but he was willing to step out of the abyss of hell for her.#

As the number one pill alchemist of the immortal world, Mu Chen had always believed that it was because he had single-mindedly focused on concocting pills that led to him to neglect disciplining his disciple. Which in turn, caused his disciple to be led astray by the seduction of devil cultivation, leading to the three realms to fall to disaster. After his rebirth, Mu Chen resolved to properly teach his disciple, give him the very best resources, earnestly love him, carry him close to his heart, teach him by way of example, and didn’t let him grow corrupt.