Saori's feelings for Kei grows as time passes, but she just doesn't have the courage to confess. Playing it off as a joke, she asks Kei if he would go out with her if she scores more than 90 points on all of her subjects. Kei agrees.
With college entrance exams on the horizon, Saori has to get serious about her studies. Knowing that her daughter won't be able to focus in a group environment, like a cram school, Saori's mother hires a tutor. And he's hot. What is a high school girl to do?