Riding this new pleasure, you supposed that your weaker senses as a passenger were the reason why you did not perceive this a while ago. Within you, the primal desire has started to emerge as you want the same arousal from your previous experiences. Of course, this time you did not have a member to play with (and you secretly loved thick, long ones), but this experience compensated with its novelty. At least the initial perception was similar to your time in the coach's body.
Wanting to indulge in this feeling further, you placed more concentration on the abdominal area, and you felt the pressured feelings, both the arousal and the desire to micturate, increase. You had to admit that your senses were very weird... as the majority of your body felt numb except the crotch, where the feeling was just radiating. You noticed your legs have stopped twitching as the rest of your body seemed to have relaxed a bit. You could hear Eliza whisper while looking down towards her legs, "Huh, I swore I needed to use the bathroom just now, but I guess it was just a fluke. I don't feel anything now. Today is just so weird for me." At the end, you thought you heard her sigh a bit before returning to grading, as if she enjoyed holding it.
Inside, you were stunned by this revelation, as it seemed to show that you can also control certain body parts to perceive and move for yourself as well as your host. "This...just...got...interesting," you thought. "I wasn't really keen in staying in this body for too long, but I have learned quite a bit so far. Let's see how far I can push this power."
The heat slowly enveloped the crotch as the feeling kept building. In response, you decided to focus your attention on Eliza's slim legs. Soon, the slight numbness dissipated from your lower half as you assumed control of her legs. You squeezed the legs closer together to contain your excitement. You also enjoyed the feeling of nylon rubbing against those legs.
Suddenly, a group of 3 freshmen visited Eliza's desk to ask her to clarify a book passage. While she was doing so, your felt the heat built up so much that you chose to spread the legs in an effort for the heat to dissipate. As the angle between your legs increased, you could feel the pencil skirt ride up until the hem reached close to the hips. The pantyhose pressed closer to the crotch in response. You were covertly ogling at the current scene. The top half of Eliza, currently controlled by her, was actively conversing with the freshmen in a professional manner, while her bottom half was spread wide open like a tramp. While her cheeks were slightly flushed, Eliza continued like she was mostly unaware of what was happening to the rest of her body. Luckily for her and the class, a partition below the desk surface blocked the view of her legs, but your mind still found it erotic. Had the partition not exist, you could see yourself being erect from sitting right in front of the teacher's desk. As much as you wanted to take control of one of Eliza's arms to rub your crotch, you were afraid that it might interfere with her work. (Fortunately, you still intend on upholding the general morality as a sign of 'being an adult'.)
The arousal was getting too much, and you felt that you were losing grip on the perceptions of the legs as you slowly became worn out. You hope to at least make it to the end of the period to relieve yourself properly. Glancing at the time on the desktop from the corner of Eliza's eyes, you saw that there were only 5 more min until the end of the period. Unfortunately, you believe you were at your limit, as you felt the first few drops leak through your crotch. The damp spot that formed on your panties and gusset seemed to prime your crotch to release more contents. To make things worst, you whole consciousness seemed to be fading fast as you realize that you might have pushed your luck too far. Noticing the impending disaster in your last moments, you could only feel sorry for Eliza, who would probably have to clean up the mess you made, much to her shock. Your vision blackened to the sight of Eliza cheerfully addressing her last couple of points to the freshmen's questions.
You gasped for air the moment your senses returned. As you opened your eyes, you realized that you were back in your own body within the bathroom. You had been away for so long that it almost seemed unusual to return. As you stood up and shook your legs to ease the numbness for sitting too long, the bell rung, signaling the end of the school day. You figured that you should head home for the day until you remembered that you were supposed to be excused from school this afternoon. So unless you were sure you won't be caught by your friends or the faculty, it might be best to not venture out during this time.