Hey m8s!
I wonder if you know about hentais. doujins or non animated content where the girl masturbates or gets fucked in classroom while the rest of students are doing class.
Here is the typical example:
This stuff is too good
bump for interest
Here goes another one:
Cmon mates, help me a bit!
http://hentaidream.me/yokujou-bazooka-the-animation-episode-1-english-subbed/