She Took Back Her Children and Got a Husband - Chapter 11 - Must Apologize

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.

“With my knowledge, give me a fulcrum on which to place it and I shall move the world!”

The world had started doomsday, and I struggled for a year, before I died under an enchanted beast’s claw. Heaven has given me another chance, back a day before the end happen. Will I be able to change my fate, and that of my loved ones? Now, I will start my journey on becoming the strongest on the planet that the Gods have changed into a game world.

- Description from Novelupdates

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.