Justin (Justine?) the mare-girl collapsed to the floor as the larger male slid his stallion cock deep into her ass. She could feel her muscles shrink and soften as two large breasts sprouted and pressed against the floor. The anthro stallion pumped faster and faster, almost ready to cum inside her-
-But suddenly Mr Hawkins snapped his fingers. "Time is up! Line up and prepare to be graded."
The students climbed off of each other and formed a line. Every one of them had transformed into something at this point: aside from the two pig-boys and the pair of horses, there were several anthro cats and bulls, an anthro orca, and even a couple of dragons and orcs.
Justine found herself standing at the end of the line, next to the huge stallion-boy who had transformed her. He looked down at her and grinned wickedly.
Mr. Hawkins passed in front of each student and gave them grades and comments for the test one by one.
He nodded at the two pig-boys. "Rick and Phil... Good use of teamwork. A B for each of you."
Mr. Hawkins smiled as he looked up at the stallion next to Justine. "Jesse. As usual, your performance was superb. You have a strong will, and you know how to use the element of surprise. You get an A."
Justine trembled nervously as Mr. Hawkins looked her over with a smirk. She was afraid of failing the test, and she was even more afraid of the mix of fear and powerful attraction toward Jesse. Was she going to be expelled, or worse?
After a moment, Mr. Hawkins spoke. "Ah, Justin. That's you, isn't it? Your performance was spotty at best. You did a good job defending yourself against Rick and Phil, but your confidence got the better of you and you failed to maintain an awareness of your surroundings. You also failed to transform *any* of the other students. I expect better from you next time. C minus."
"Wait, don't go! Will you please change me back, Mr. Hawkins? I don't think I can do it myself..."
Mr. Hawkins frowned at the mare-girl. "No, I will not. It seems that Jesse has taken a liking to you. If you want to break free from his control over your form, you'll have to do it yourself. Otherwise, you won't learn anything."
Mr. Hawkins turned his back on the line of students and walked away. "Class dismissed."
As the students scattered and left the room, Jesse grabbed hold of Justine and kissed her deeply, his long horsey tongue invading her mouth.
"I'm not finished with you, sweetie. You'll be seeing a LOT more of me..."
Jesse then trotted away to his next class. Justine had more classes that day, too, but she couldn't transform herself into a human male again no matter how hard she tried. So, mortified, she went to class as an anthro mare. To her surprised, nobody seemed surprised at this. It was a time in the semester when a lot of tests like these were going on, and many students were in similar predicaments. For example, Justine found herself seated next to a sad-eyed female anthro gecko. She must have been unwillingly transformed, too, since this was an all-boys school.
Throughout the day, Justine studied hard, searching desperately for a way to improve her situation. She tried new spells, charms and willpower-building exercises. Her chances of escaping from Jesse's control, however, seemed slim.
At the end of the day, Justine the mare-girl went back to her dorm room nervously. The door to her room was unlocked, and inside her new stallion mate was waiting for her, his long horse cock fully erect and twitching.
"I've been waiting for you." Said Jesse.
Justine considered her choices...