Kana Orikura finally confessed her feelings to her upperclassman Yoshihiko just before he left for college, and the two shared a first kiss and started dating. Since then the relationship has been a struggle, and Kana feels lonely and low as she tries to study for her college entrance exams while he all but ignores her. Things take an unexpected turn when Shogo Hayakawa, a young, attractive teacher newly assigned to her class and a relative of her father, moves into her house. Kana must decide whether to stay loyal to Yoshihiko or be drawn toward this new arrival in a single-episode romantic drama.