​Tsugunai Episode 4: A Story of Love and Revenge, Filled with Beautiful Female Students. Experience the enticing world of the ‘Petit’ label’s ‘coquettish doll’ series in the latest installment, ‘Tsugunai Episode 4: For the Sake of My Beloved Little Sister, I Must ‘Educate’ These Beautiful Female Students’. Dive into the timeless classic of Bluergill’s iconic animation series, showcasing charming and erotic characters in the most captivating scenes of degradation. Follow the protagonist as he seeks vengeance for his precious sister, meticulously gaining the trust of his charming students, leading them into a moral decline. Witness the humiliation of haughty mistress Ruriko, the ‘lessons’ given to cheeky sports girl Natsuki, the corruption of the unexpectedly diligent gal, Meiko, and the ultimate ‘instruction’ for the diligent honor student, Aoi. Don’t miss out on this thrilling and seductive adventure!​