Bakunyuu Saimin Onna Kyoushi

The virgin protagonist "Rin Yatake" lives a boring life, hoping one day to have a relationship with a woman like "Hiroko Motohashi," a female teacher with big tits. One day, Hiroko gives him a hard time for a trivial matter, and Yatake Rin angered by the cold-bloodedness of Hiroko's response, decides to get even with Hiroko by playing a dirty trick on her, and learns a powerful technique. What started as a complete vendetta by Yatake Rin soon turns into a peachy game in which Rin plays with the voluptuous body of the burly female teacher as he pleases.