This is it

Kasha nodded, and nervously took her seat. The teacher squealed with delight. “Excellent! Well class, you can call me Miss French,” she chirped, writing some abyssal letters on the chalkboard that Kasha couldn’t read. Presumably it was her name, Miss French. “When you think of oral, what comes to mind?” she asked.

The furthest succubus to the left raised her hand, a brawny purple-skinned succubus with a prominent tent to her tartan skirt. “Blowjobs!”

To her right, a pink-skinned succubus painting her nails said, “Cunnilingus,” with a smirk.

To Kasha’s right, a purple-skinned succubus with big glasses raised her hand, waiting for Miss French to nod to her before saying “oral exams? As in spoken exams?”

Miss French giggled. “Did you already forget what the name of this class is?”

The succubus with glasses blushed, but the other two turned their gaze towards Kasha and said, “No~” with lust evident in their eyes.

“Well, you can get to that in the intermediate courses,” Miss French stated. “You have to start from the basics. After all, it’s easy to cum from cunnilingus or a BJ. But if you want to wrap a mortal around your finger, make her cum from just a kiss~ She’ll be begging you to go further~”

As Miss French spoke, her tail traced a diagram of the the humanoid mouth, one shared between humans, elves, dwarves, and similar mortal races. She then followed by drawing more, detailing the mouths of Dragonborn, then the beast races, and more. She explained the anatomical differences between each with a surprisingly academic perspective. The lecture lasted an hour, although it went by quickly.

It was clear that the two succubi to Kasha’s left had gotten bored, the brawnier one impatiently tapping her foot through the latter half of the lecture, the feminine one napping. Miss French saw this and clapped her hands. “Alright, time for the practical part of the lesson. Everyone, please partner up. I’ll give our cute morsel first choice, you can choose anyone or anything in this room~”

From the teacher’s tone, it seemed she herself was included. That made the choice between her, the three students, and the doll. It was obvious this practical portion was what Kasha needed to pass to get out of here, and equally obvious it would involve kissing. But the teacher had not explained what, precisely, this entailed. So it was unclear what Kasha wanted in a partner.

The burly succubus had a cock that was rock hard, the tip poking past her skirt. She looked like she could jump atop Kasha at any time.

The feminine succubus seemed more calm in posture, but her eyes blazed intently, intent on claiming Kasha if she got the chance.

The nerdy succubus couldn’t bring herself to look at the mortal, surprisingly shy for a succubus.

The doll was slumped over in one desk, and while it had green skin and horns, it was clearly inanimate and had no lustful feelings towards Kasha.

And the cute Miss French was trying her best to seem impartial, but every time Kasha glanced her way, her tail began to wag like an excited dog.