The big-titted teacher is a crazy slut ?

In the high school, a new teacher is coming to replace the old librarian just retired. The new comer is a real sexy piece of ass, seeming to be nice and friendly. The library never was so full since she came, though most of the student coming to peek on her then really study.

Once a small group of friends is kind of forced to make an evening session to the library, even if that's not their thing. Their session was a bit forgotten by the new librarian and caught red handed doing naughty stuff (consulting erotic pic on the library, masturbating...)

The blackmail will be nice.

One of the key plot I would like to put into it is the group forcing her to wear various suit of her wardrobe in "special night session". They will learn that she have a kink for erotic attire but never dare to wear them.