Kuroda Sensei's Secret Special Training

PE teacher Kuroda frets over memories of delinquents Sudou and Negishi enjoying his rear while he drinks beer. Determined to prove he is not weak in the ass like Sudou, he dons a karate gi and begins solo training with sex toys. He inserts a vibrator into his anus and trains hard, loudly denying the pleasure even as it intensifies and he climaxes repeatedly. He ultimately sinks completely into anal pleasure and ends by shouting that he will train one more time.