Haruka is a third-year English literature student who meets Aya, a sophisticated and beautiful graduate student, through her seminar. Seeking advice on graduate school, Haruka is told by Aya that the fastest way to improve her spoken English is to date a native male speaker and learn through conversation. Taking this advice to heart, Haruka begins visiting tourist spots like Asakusa with Aya. One day, on their way home, Aya invites Haruka to her apartment, and their relationship gradually deepens. However, this woman Aya is actually Haruka herself!