Magika no Kenshi to Shoukan Maou - 4.6.2 — Trial of the Moon

I was summoned to a ruined world and received the ability to create various things. Since I don’t have a house to live in I will make a house. Since people are gathering at my house I will make a town. Since the town is being attacked by monsters I will make the strongest weapon and repel them. Using my infinitely charging magic power I will remake this world as I please.

To the world, Isabella Harrington is nothing special--quiet and easy to forget despite her wealthy background. After her parents died ten years ago, her inheritance fell under her uncle's control. Even her marriage was perfectly planned by them.But Isabella was far from being anyone's pawn.Behind her calm smile and flawless disguise hides a fiercer and more ruthless side. She would do anything to take back everything that was stolen from her, even if it meant attaching herself to her family's rival.Enter Kaelian Veyron, the young master of the powerful Veyron family and president of Phoenix Corporation. He's the man every woman dreams of marrying.Cold, calculating, and devastatingly handsome, he easily tops the nation's “most desired” men lists even after an accident left him blind.No one, however, imagined that the 'ordinary' Harrington heiress would pursue him so relentlessly that she boldly moved in next door, sent him flirty texts, and removed all obstacles from his path, and even confessed her feelings in public.Everyone waited for her to be rejected and humiliated.Unexpectedly, Kaelian surprises them all by taking Isabella as his wife....He thought her feelings for him were fleeting, and he should get rid of her early.But later, he realized, she had already stolen his heart.Now, he can’t let her go.

What was originally an ordinary day, suddenly became a historical turning point. Enormous, mysterious Cubes appeared all over the world without warning and as if Judgement Day’s spears, inserted themselves into the blue planet.

From inside the enormous Cubes, endless streams of monsters gushed out alike raging tides, utterly defeating the unguarded armies of each state in the blink of an eye.

In order for humanity to preserve its final embers, the heads of states issued orders of retreat, to no longer attack the Cubes but rather to cling to remote cities, which they turned into self-sufficient survivor bases and around which they built 100-meter-tall Walls of Life!

Many years later, while bearing the heavy weight of history, the first expeditionary force brought back a world changing piece of information. The Cubes possessed exceedingly high intelligence and they regularly transmitted mission instructions to humans nearby. The mission rewards were incredible.

Since then, humans rushed out of the confines of the walls and once more set foot on the wasteland!

- Description from Novelupdates

With the marriage of her prostitute mother to the Count, Aria’s status in society skyrocketed immediately. After leading a life of luxury, Aria unfairly meets death because of her sister Mielle’s schemes. And right before she dies, she sees an hourglass fall as if it were a fantasy. And just like that, she was miraculously brought back to the past.

“I want to become a very elegant person, just like my sister, Mielle.”

In order to face the villainess, she must become an even more wicked villainess. This was the new path Aria chose to take revenge on Mielle who murdered both her and her mother.