In the midst of the exam season, an honor student high school girl is studying intensely in a cram school's self-study room one day. As she focuses on her studies, temptation strikes, and she gives in to her secret masturbation habit. The unexpected episodes that occur during her study breaks are filled with tension and urgency, heightening her pleasure. Despite knowing she'll be scolded by her parents if caught, and understanding the rationality of stopping, she's unable to resist the impulse. The conflict between her desire and rationality unfolds like a drama. The struggle to balance studying and sexual desire creates an unexpected and thrilling scenario that will captivate readers. The self-study room setting adds to the excitement as a momentary impulse develops into a shocking story.