OFSD-052 Ultra slow piston x voice suppression explosive orgasm! As long as you keep quiet, you can have sex with anyone in the silent library

"Please refrain from making any noise during lewd acts inside the library," reads a strange sign posted in the library. If you make any noise inside the library, the librarian and other patrons will warn you to be quiet by saying "Shhh!!!" We are two virgins visiting this library for the first time, and as we look around the library, we come across a beautiful woman with big breasts having her breasts fondled by a man!? As we secretly peeked in... we noticed a rock-hard erection...