The bestseller! The answer is 50OS!
The "Sex Academy An orphan and one-legged dog, in the sense of a young virgin, enters a special group in the Sex Academy. For them - a special caste of virgins - on a budget without a line and not even through the bed.
And in general, on the very first day she meets the rector, who, little of what the BDSM leads, is still madly in love with her. And suddenly he fell asleep that his wife should be a virgin acky cover on yogurt.
Five volumes about how he deflects her from practical classes and labs, and eventually drops, because his wife turns out to be a theoretically subdued barrel.