The first promotional video for Harmony of Mille-Feuille has been released, offering a preview of the upcoming musical anime. The trailer focuses on protagonist Uta Komaki, a first-year high school student whose passion for singing is hampered by extreme shyness. Viewers can expect a story centered on Uta's internal struggles as she navigates joining a school club.
Produced by Jumondou, the series appears to lean into themes of coming-of-age and overcoming personal obstacles within a school setting. The PV suggests a narrative that will explore the challenges of finding one's voice and confidence, particularly within the competitive and social environment of a school music club, contrasting the light music club's allure with the a cappella club's invitation.