Maki Amamiya is a stunningly beautiful and popular woman in the neighborhood, with an upbeat and cheerful personality. Her husband is away on a work assignment, and she works from home as a computer instructor, often feeling lonely between lessons. Behind her elegant appearance lies a growing, uncontrollable desire, craving a new outlet. One Saturday afternoon, a new student arrives—slightly handsome and instantly captivating her heart. Overwhelmed by lust, she seduces him, and they quickly cross the line into a passionate affair. The next day, the man returns with a friend, and both become obsessed with their secret lessons with Maki. Ultimately, computer learning takes a backseat to their escalating desires.