Yuzu, an honor student attending a prestigious high school in Tokyo, is serious-minded, strong-willed, and comes from a stable, supportive family environment that allows her to focus entirely on her studies—she's already secured admission to a top-tier university after graduation. In contrast, her classmates "Kawagoe" and "Meguro" were once model students, but after struggling academically, they fell into delinquent behavior and became underachievers. One day, Yuzu witnesses Kawagoe committing an extortion incident. Unable to contain her anger, she confronts him sharply. Enraged by her attitude, Kawagoe retaliates by secretly filming Yuzu during a private moment and uses the footage as blackmail material, escalating his malicious actions. When summer vacation arrives, he lures Yuzu to an empty classroom where no other students are present, brings her under his control, and proceeds to brutally rape her, indulging in every form of depravity. The stark contrast between the righteous Yuzu and the fallen delinquent Kawagoe intensifies the dramatic tension and allure of this story.