"I can't believe it... Miss Reiko Sawamura is a lesbian!" Koharu Aoi, upon discovering the hidden truth about her admired teacher Reiko Sawamura, is shaken to the core, yet harbors deep anger. In an empty classroom after school, she corners Reiko, strips her completely naked, forces her to swallow copious amounts of saliva, and violently assaults her genitals with a bundle of marker pens, tormenting her relentlessly. However, pushed to her limit by Koharu's extreme actions, Reiko's twisted affection erupts as she turns the tables, attacking Koharu and sending the story into a wild, uncontrollable spiral!