Yukino Miyazawa serves as the female class representative and is the most admired freshman girl at her high school. Excelling in both academics and athletics while maintaining an elegant and sociable demeanor, she has been the subject of admiration throughout her life. However, beneath this facade, she is extremely vain and works tirelessly to uphold her high grades, athletic prowess, and polished image. Her greatest desire is to be the focus of attention and praise—which is why she despises Souichirou Arima, the male class representative and the only person more accomplished than her. From the first day of high school, she has tried in vain to steal the spotlight from her new rival.
Finally, on the midterm exams, Yukino achieves the top score, surpassing Souichirou. To her surprise, he congratulates her on her success, making her question her own deceptive ways. When Souichirou confesses his feelings for her, Yukino rejects him and boasts about it at home with only a slight twinge of regret. Yet the next day, Souichirou arrives at Yukino's house to deliver a CD and witnesses her true, unrestrained self; armed with this secret, he blackmails her into helping him finish his student council duties. Forced to spend time with Souichirou, Yukino discovers that she is not the only one hiding secrets.