Sansha Mendan - Rensa Suru Chijoku Choukyou Gakuen - Immoral Edition Ver.1.2 by BISHOP - Adult Sex Game

The protagonist Ryou Kawabata is someone who enjoys watching women his senior succumb to him. As a student, it is obvious that the targets closest to him are the female teachers.
As numerous female teachers succumb victim to his will, unexpectedly there was one who fought back- Yuuna Hagiura, and that gave Ryou some trouble.
But even as the Hakushou Academy was informed of Ryou's misdeeds by Yuuna, the whole incident was kept behind closed doors because of the risk of ruining of the school reputation if the incident goes public........