A woman

When he woke up he felt different but couldn't place it. As he took stock of his surrounding he felt some significant changes. As he opened his eyes and looked down at his body, he was filled with dread. He was wearing a dress for one thing. He also had rather large breasts. He took stock of the rest of his body and determined that he was indeed a female version of himself.

As Aarlon looked around he saw an older man wearing his clothes.

"WHO ARE YOU!? WHAT HAPPENED!? WHAT'S GOING ON?!!" He/she yelled.

"I sometimes like to trade genders with students." He said. "Makes them better lovers later on and can be interesting while the spell is effective."

"C...Camila?" she asked.

"Yes, but call me Carl."

"But why now?"

"Fewer witnesses and I feel safer as the man." Carl replied. "Plus your lack of experience will make you wonderful bait." He added strolling out.

"WHAT?!!!" Aarlon yelled after him.

Aarlon ran outside after Carl to confront him when his thoughts were interrupted by a woman's voice yelling, "Not Again!"