Mizuki Kotobuki, a human resident of Hoshihama’s City of Masters, shares a steadfast bond with Sylvie, a three-star pastry chef hamster celebrated as a culinary idol among Master Hamsters for her expertise and charismatic charm. Their partnership thrives on mutual trust and seamless collaboration, intertwining Mizuki’s role in the human community with Sylvie’s covert contributions to Hoshihama’s operations. Together, they exemplify the discreet alliance between humans and their hamster companions, who lend specialized skills while guarding their hidden existence. Official narratives center on their joint endeavors, highlighting their synchronized efforts within the series’ interconnected framework.