Mark, now Marcia, scrubbed the floors of the warlock's tower. The warlock, named Beel, had purchased her on the slave market. After making her poor decision to travel in the woods alone at night, Mark was captured by slavers and brought to a bazaar, where she was then sold to Beel. Beel told her that he had purchased her because he detected recent transformative magic on her and was curious.
Hoping to earn Beel's sympathy and help, Mark told him her whole story. Unfortunately, Beel was amused, not sympathetic. Though he was interested in how he might return Mark to male form. So he made a deal with the woman. Mark would be his female slave for as long as it took Beel to find a spell or potion to turn her male again. After he became male, Mark would be his slave for an additional six months.
Mark didn't have any other option, so she agreed. Beel renamed her Marcia and whisked her away to his tower, where he provided her with homespun dresses to wear and a small bedroom to sleep in.
Marcia sighed and sat up, checking her work. Beel was very particular. She'd had to redo a cleaning job many times. But it looked fine now. As she stood, Beel teleported into the tower. He grinned at Marcia.
"Your bosom has come free again, Marcia," he said, leering. Marcia blushed. Beel had turned her small bust into a much bigger one after he got very drunk one night. But he didn't change her dresses, even after he sobered up, so her breasts had a tendency to pop loose of her clothes.
"Welcome home, Master Beel," she said. Beel walked over to her and stroked her hair.
"You are in luck, my dear slave. I have finally found it. The spell to make you male again." Marcia's eyes widened happily. "But it is complex. It will take me some time to master. Time that I would otherwise use for my own projects." Marcia swallowed nervously. "So, in exchange, I am changing the terms of our agreement. I will turn you male after nine months, during which you..."