"We'll do this the easy way," Derek said. "I don't feel like experiencing my first TF soaking wet." His hand trembled as he took the glowing bottle from the shopkeeper.
"I've mixed the exact amounts to achieve the transformation your friend asked for. You need not worry about anything going wrong."
"That won't stop me from worrying about this going RIGHT," Derek said. He brought the potion to his lips. It smelled like spring flowers. He glanced at Sonya, whose expression had changed to apprehension. It looked like she had finally realized the scope of what she had asked him to do. Derek also believed there was a hint of jealousy as well. She wanted to transform as much as he did, but for the time being she had to stand by and watch as it happened to him first.
Closing his eyes, he tipped the small bottle into his mouth. The taste was somewhere between cranberry juice and table varnish. He barely finished swallowing when he switched right to coughing at the unpleasantness.
"I'm okay," he said in response to a worried look from Sonya. "Unless that was actually poison." He glanced at the woman. "Can't you use magic to make those things taste better?"
"Sorry, but casting a spell on a potion dilutes its effectiveness. I should have warned you about the taste."
"It's fine, it's fiii--" Derek's voice suddenly cracked. "Fine... It's fine." He repeated the words, each syllable sounding higher pitched than the last. "My voice! I... I sound like a..."
Derek turned back to Sonya. She returned his accusing glance with an impish smile.
"You know I'm not a fan of TG," Derek said, his voice now unmistakably feminine. He became aware of several other changes all happening at once. It looked to him like Sonya was growing, but he knew from the dizziness that he was actually shrinking. His scalp also tingled, and within seconds he could feel hair brushing his ears. Pressure built upon his chest, but an uncomfortable shifting in his pants concerned him more than anything. Soon he could no longer feel his member against the fabric of his boxers. What he felt instead was a shifting of parts within his lower regions that made him slightly nauseous.
"Would you like to see the transformation?" the woman asked. She pulled a mirror out of her pocket. Derek reached out a hand to take it. At this point he saw that his sweater sleeve was almost completely covering his hand.
Instead of giving the mirror to Derek, the shopkeeper dropped it on the ground. It began moving, unfolding itself. As it built itself up, a frame started to clamp around its edges. It quickly worked itself into a full-length vanity mirror. In it, Derek saw a girl his own age, with features very similar to his but much more feminine. The girl also had a slightly longer haircut, the same color brown as before, but softer. Bangs covered her forehead and her ears were almost completely hidden.
Derek saw that his sweater was quite baggy on him now, obscuring what was probably an hourglass-shaped torso. The only definition he could see was in his chest. Two round shapes created faint bulges in the fabric. He reached down to feel his groin, not surprised to find it devoid of his manhood.
"How was it?" Sonya asked in an eager voice that barely held back a tsunami of excitement.
"Weird," Derek answered. He...SHE...couldn't take her eyes off the girl in the mirror, hardly believing the person in the reflection was truly him...or truly HER.
She sighed faintly, trying to balance the terror of losing her masculinity with the wonder of becoming another person. "Just...WEIRD."