She needs to practice her oral skills.

D class has only been at the Academy for a few months so most of the students are fairly new to pleasuring futas, and 36 is no exception. Training students is one of the primary tasks of Class Managers, and you take your job seriously.

You glance up at Teacher Glass and Student 22 at the front of the class. 22 has taken very well to giving oral pleasure, the first in D class to be able to deepthroat. You think that's the main reason Teacher Glass was using her near the end of the class, so the others would get a chance to stay behind and watch her more closely. Five of her classmates are gathered around them, watching with fascination as 22 takes their teacher's massive cock down her throat again and again - slowly, sure, but she almost never gags. From how they've positioned themselves you can guess that at least one of them is masturbating, and two of them seem to be rubbing each other between the legs.

You return your attention to 36, who is doing a fair job of stroking your cock. The slow dribble of precum has smeared over the tip as well as her slim fingers, and when you look down into her blue eyes as she's sucking your nipple they've taken on the glaze of a girl who's starting to be overpowered by the pheromones.

The combination of sexual excitement and pliability at that stage is ideal for training. You give her shoulder a nudge, a signal every student learns to interpret within a couple of weeks, and she quickly and gracefully lower herself to her knees and open her mouth. You guide the tip of your hard cock in between her soft lips and she eagerly swirls her tongue over it, moaning, almost whimpering, as the heavy load of pheromones in your precum hits her system.

She sucks you hungrily, using both her hands to stroke your shaft. Her technique is still rudimentary but there's no mistaking her enthusiasm.

Once she's warmed up a bit you tell her to remove her hands and to try to take you down her throat. She nods without removing her mouth from your cock, a hint of nervousness breaking through on her face.

Her effort is valiant but ineffective. She can take you to the back of her throat, but every time she tries to go deeper she gags and pulls back, long strings of thick spit hanging between her mouth and your cock. She apologizes each time and goes back to sucking you, slowly easing you deeper, but the same thing happens every time.

You look up at Teacher Glass again. She's now throat-fucking Student 22 a few short strokes at a time, giving her a few moments to recover between each set of thrusts, the other girls still watching closely.

Secondary Class Manager White is fucking one of the girls who was sucking her before, both of them turned towards the front of the classroom to watch Teacher Glass and Student 22. The other girl has joined her friends up front, while Provisionary Class Manager Teal is standing in the doorway, switching between watching the girls and keeping an eye out for trouble in the hallway outside. She really is doing an excellent job, fulfilling her duty to the Academy and the Futarchy in an exemplary fashion.

Student 36 gives another gasping apology after yet again failing to swallow your cock. The effort she has put in has made tears streak down her face and she has thick strings of spit and precum hanging from her chin.