Tsugunai is a hentai novelty from the PoRo studio released in June 2022 based on the visual novel of the same name by the private circle "Blue Gale". 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...