Ep. 21: A new transfer student arrives while Senbei creates a duplicate of himself to manage conflicting social plans.

21

Hashimoto, a transfer student from City Island, joins the class, causing excitement among peers who have never encountered city dwellers. Senbei faces a dilemma when he promises to take Arale and Gatchan to an amusement park on the same day Midori provides tickets to a movie. To resolve this scheduling conflict, he invents Copy-kun, a device designed to duplicate himself. However, the creation malfunctions by replicating Senbei’s personality traits along with his physical form, leading to complications. The episode highlights the students' reaction to the newcomer and the chaotic results of Senbei's technological solution to his personal time management issues.