Mesu Kyoushi 2 ~Injuu no Rasen~
Original title: 牝教師2～淫従の螺旋～
Shingo is a high school student. He likes to peek at female students changing their clothes. One day, Sanae, a training teacher, comes to his school. He immediately tries to peek at her, but he has an accident and is taken to a sickroom. Rihoko, a medical doctor, secretly gives him a drug. With the drug, he plans to train his teachers and classmates to become his sex slaves...
Download and install instructions
Game is available for direct download from various file storage providers. Install instructions can be found on developer website.