Worried about his son Akira, who was forced to repeat a year, Akira's father hires a private tutor—Koneko Mineko. Despite her appearance, Mineko exudes a mature charm, and Akira instantly falls for her sensual allure. From that moment, he can't focus on studying, completely infatuated with Mineko. Sensing his distraction, Mineko proposes a special lesson to help Akira concentrate. Through these erotic tutoring sessions, Akira's academic performance steadily improves, and his motivation to study grows stronger.