Latex Sex-Ed #4 (Pixiv Fanbox)

Kaori giggled as she slapped the riding crop across her slave's back and roughly turned it so she was facing her. "Now then, one of the most important things to learn as a sex slave is how to pleasure your Master using any one of your holes. My little slave here has just started and as one of the newest members of the Sex Brigade, she is still in training for how to properly pleasure her Masters. But as a special treat for the class, she will demonstrate how to accept a proper face fucking!"

With that, Kaori dropped her skirt and pulled out a long pink strapon from her backpack which she expertly attached to her waist. Next, a tube gag attachment was retrieved and brusquely jammed into her slave's mouth using a hidden hole in the mask. Kaori leered seductively at the class as she gently probed at the gag's opening with the strapon. "Observe how the slave has assumed the position with its head held high to provide easy access to its oriface. The gag will keep its teeth out of the way so that it may use its tongue to stimulate whatever is put inside its mouth. Watch!" Kaori gripped the back of the slave's head and gently pushed the phallus inside.

The students stared quietly as the slave gently bobbed her head up and down the shaft. The classroom was filled with lewd sucking and slurping noises.