Aoki was a model student who always got the top scores on tests. However, during one English test in middle school, Ozawa bested Aoki's score; Ozawa confesses that his parents promising him to buy an exclusive item motivated him to study harder than ever before. When Aoki learns of his "failure," he spreads the rumor that Ozawa cheated on the test. When Ozawa confronted Aoki about the incident, Aoki showed much contempt and Ozawa retaliated by punching him in the jaw; the two do not talk for years even when they are in high school.