Haruna is a third-year university student majoring in English literature. Ayako, a senior student she met in her seminar, is an intelligent and beautiful graduate student. Haruna wants to go on to graduate school, so when she consults with Ayako about how to study, she is told that the fastest way to learn English is to date a native speaker, and Ayako starts taking her out to the tourist spot of Asakusa in the daytime. One day, on the way home, Ayako invites her to her room... In fact, Haruna is lesbian and bi!