Tsuma Netori Kan: Bijutsu Kyoushi no Baai 01 English Sub

This is the story of Makoto’s time as a university student studying to graduate. At that time, folk art professor Yurina Suzukaze, married to a man who now works in Italy, became a substitute professor at the university when her father, a gallery owner, was ill and in need of care. Yurina’s former classmate Sakakura feels a deep interest in her, and together with his accomplice Yasuno, they hatch a plan to train and subdue Yurina.

After receiving an assignment from the school principal, Yurina prepares to join an exchange and training event. On the day of departure for the event, Sakkura friendly offers her tea, but after drinking it, Yurina feels dizzy, her vision blurs and she ends up fainting.

When Yurina wakes up, she is shocked to see her situation. She is completely naked and tied to a training chair, with a ball in her mouth and drugs injected into her nipples and clit, which have become erect. Sakakura begins talking to Yurina, who is about to pass out, to help her recover. She tells him that she will be confined in this training room for half a month from today. For what seems like an eternity, Yurina will continue to undergo horrible sexual training.