Yuma is a teacher at a prep school. She has fallen in love with her bisexual student, Kotono, a third-year student at a private school. Yuma is 27 years old and single. She is bisexual, but currently has no boyfriend. She is popular with students for her big sister personality, and they often ask her for advice. One day, her student, Kotono, a third-year student at a private school, comes to her for love advice. As Yuma listens to her advice with kindness, she gradually begins to like Kotono. Yuma invites Kotono to dinner as a thank you for her advice, and seeing today as her chance, she invites her to her house.