Nanase, a beautiful gal, felt unsatisfied with her popular boyfriend's intimate moments. Frustrated, she repeatedly made lewd remarks about Nozaki, a nerdy guy from the same committee, and demanded he show her his... Nanase, who had assumed it would be small, was shocked to find that Nozaki's penis was incomparably larger than her boyfriend's! Unable to resist the mounting sexual desire, Nanase, under the pretense of using it as a dildo, tried inserting Nozaki's penis. Filled with a huge penis, she forgot about her boyfriend and only thought about pleasure...!?