There's the series of MEYD-632, 658, 671 and 797.
A married woman takes a part time job she thinks is for TV or a movie company but turns out to be AV instead.
The one I watched goes from innocent married woman to having to watch porn while sound editing, helping out on set as AD, giving the male talent a BJ because he can't get hard, getting seduced into sex by a coworker, the other coworkers finding out and making her give them BJs while they film it, to the end where she decides to become a porn actress herself and you see her shooting her first scene.
Knowing how MEYD series tend to be the same movie over and over, I'm assuming the other three have a similar progression from innocent to AV actress.