Catch! Teenieping centers on mischievous beings known as Teenieping, who enjoy entering people's minds; however, their playful disposition and magical abilities can cause chaos in their hosts' lives. Once the Teenieping are released onto Earth, Princess Romi of the Emotion Kingdom is transformed into an ordinary girl who must become a magical girl to stop them, all while managing her new civilian job at Bakery Heartrose alongside her coworkers Ian, Kyle, and Jun.