Humans and demons had been at war for generations. The conflict nearly destroyed both kingdoms, so in an unprecedented move, the human king arranged for his heir to marry Luxenia, the Demon Queen. The prince moved to the demon kingdom and became her husband.

Although it was a political marriage, Luxenia gradually grew fond of him. She saw him as both her property and her greatest war trophy. In time, they had a daughter named Rhaela. To Luxenia's disappointment, the child was born completely human, without horns or demonic powers.

Luxenia treated Rhaela with coldness, seeing her as a failure. Worse still, Rhaela was quiet and gentle. She lacked the cruelty, ambition, and malice that the demon royal family had ruled with for centuries.

Things only grew worse when Rhaela came of age.

By demon tradition, the heir must kill the reigning queen before marrying and taking the throne. Luxenia herself had slain her own mother and fully expected Rhaela to do the same. Among demons, it was considered the greatest honor a queen could receive.

She constantly reminded Rhaela that it was her duty.

But Rhaela never even tried.

Luxenia knew her weak human daughter had little chance of defeating her, yet she would have preferred a weak daughter over a cowardly one. What frustrated her most was knowing demons could only have children once every few decades, despite all the attempts she forced upon her husband.

Then, one day, while Luxenia sat alone drinking wine, Rhaela quietly asked her to hold her hand.

Luxenia scoffed but agreed.

A glowing pentagram suddenly appeared beneath them.

Rhaela had performed an ancient, forbidden ritual.

When Luxenia regained her senses, she gasped in horror. She was now trapped inside Rhaela's frail human body. What annoyed her even more was realizing she had lost her imposing figure along with her demonic strength.

Luxenia: "Stupid brat! What is the meaning of this?!"

Rhaela: "Enjoying your new weak human body, darling? You see, I knew I'd never be able to kill you and claim the throne. So I found a better solution. Instead of killing the queen... I simply took her body. Now I'm the queen."

She laughed confidently.

Luxenia: "How could you do something so twisted and sick?! My own daughter stole everything from me... I... I'm... I'm so proud. I never realized you had such malice inside you. This may go down in history as the cruelest thing an heir has ever done to her queen!"

She wiped away a tear of pride.

Rhaela smirked.

Rhaela: "And I plan to keep this body forever. I already love my new power... and my new curves. Enjoy living as the weak human you always despised."

Luxenia: "Oh no! I fully intend to reclaim my body! Just wait until my father hears about this, Mother—"

She immediately covered her mouth in shock.

The spell had another effect.

It forced each of them to speak as though they truly were the other.

Realizing how thoroughly Rhaela had planned everything only made another proud tear roll down Luxenia's cheek.

Even trapped in her daughter's frail human body, facing a normal human lifespan instead of an immortal one—a fate she considered a personal nightmare—she couldn't help but admire the sheer malice of the scheme.

It was exactly what she had always wanted from an heir.