During Physical Education, Maiko and Ai begin asking Kaori about her relationship with Yuki and find them to be a really cute couple. Since they had been spending less time together in recent days, Yuki asks Kaori to tutor him for their final math exam and insist that they be alone. As they begin their tutoring after school, Yuki asks Kaori about her fascination with Math and inadvertently calls her cute during their talk...