You are the heir of a noble family of dark mages, ruling an isolated territory. It was a shock when Princess Cornelia offered her hand in marriage. You were suspicious; she had a bad reputation for being cruel and spoiled. But as a small noble house, it was a no-brainer, so you accepted.

When she arrived to prepare for the wedding, she scoffed at your small castle. She was beautiful, petite, and ladylike, yet didn't hide how disgusted she was by everything, believing you were beneath her.

On the wedding day, it was obvious she would rather be anywhere than at your side on the altar, and the kiss felt empty. At night, in her new room, she lay beside you. When you looked at her, she scoffed, ordering you not to consummate the marriage. Done with her attitude, you demanded answers: why offer her hand if she didn't want to marry you? She sighed, then smirked.

"Well... I heard your family is full of dark mages. I read your history: dark rituals, human sacrifices, cannibalism... Are you... are you capable of casting that magic?" You nodded, and she rolled her eyes. "Listen, I am the third daughter of a fourth son—there are like forty people ahead of me in the succession line. So... I was wondering if maybe... you could do some of your dark magic to help me become queen. I would kill everyone on my own, but... that would make it obvious it was me, and it's too many to kill for a poor lady like me. So... dear hubby, do you know anything that could skip me ahead and make me queen? You can rule as my consort in repayment, after all; we are married now."

You thought for a moment and said you knew an ancient dark spell that could grant her that... but it wouldn't be pretty. She smirked, saying she didn't care about the price; she was willing to sell her soul or sacrifice anyone. Seeing her determination, you nodded. She hugged you, excited, and fell asleep.

A month later, you visited the capital under the guise of visiting family. While you stayed in the royal castle, you instructed Cornelia to invite her grandmother, the queen, for a carriage ride. You told her that once inside, you would make Cornelia inherit everything. Cornelia smirked and nodded. She sat at her grandmother's side, and while on the road, you cast the dark spell and made the carriage crash, rendering both unconscious.

When Cornelia woke up, she felt weird and heavier, struggling to breathe. She realized she was in her grandmother's bed, and you sat beside her, telling her it worked—she was now the queen. She smirked.

"Finally... I get what was always mine. What... what's wrong with my voice?!"

With horror, she looked down and saw an obese body with huge saggy breasts, a fat belly, wrinkly hands, and fat legs. She bounded toward a mirror and gasped in horror upon seeing her grandmother's face staring back at her.

"No, no, no, no, NO! You idiot, you turned me into my stupid, fat grandma! This isn't what I asked!"

She threw a tantrum. You sighed, explaining it was the only way: you had swapped her body with her grandmother's during the crash, and her grandmother had died in her original body, meaning she was stuck like that for the rest of her life—which wasn't much at eighty.

"NO... NO, YOU CAN'T DO THIS TO ME! SWAP ME BACK!"

You pushed her toward the wall and held her fat face. You told her she was trapped and could easily be killed, but as her grandmother, she would marry you again so you could rule as consort, or you would swap her with a pig next time. Realizing she was tricked into a miserable position, to her surprise she blushed, finding you attractive despite being horrified and upset.