Tsugunai
The protagonist of the hentai lives with his sister Nana. They were left all alone, after an accident that happened to their parents. Once, by a terrible coincidence, Nana fell into the dirty clutches of a group of anxious, influential old men and was deprived of innocence and raped in a circle … The main character could not come to terms with the injustice of the world and decided to take revenge. He got a job as a teacher at a private women’s academy, where the daughters of lustful old men study, and soon created ideal conditions for revenge…
