Shugo Chara!

When Rima gets stuck with organizing the class's book collection, Amu stays behind to help out. Rima asks Amu to call her by her first name, and vice versa. While cleaning, Amu finds a popular gag comic, which Rima grabs and speedily reads. As she reads, Rima does a Character Change and cracks a joke in front of Amu. Embarrassed, Rima tells Amu not to tell anyone that she loves gag comics. Amu runs into Kairi and learns that Rima was nearly kidnapped before and there was a dispute between her parents. The next day, Rima accidentally Character Changes and cracks a joke in front of the entire class. Afterwards, Rima runs out of classroom and Amu chases after her. Amu tells Rima that a similar incident happened to her, referring to Amu's first Character Change. The two girls have a heart to heart and become best friends.