Princess Vanilla reigns as a revered figure in her ice cream kingdom, where royal duty demands mastery of crafting ice cream. Despite relentless daily practice, her repeated failures spark profound frustration, driving her to depart her palace on a quest for answers.

Her journey leads her to cross paths with Anpanman and Kokin-chan, whom she joins as a steadfast travel companion. Through shared trials, she slowly unravels the root of her ice cream-making struggles, confronting a hidden inner conflict tied to her royal identity and true purpose.

While she seeks clarity, Baikinman seizes her absence to attack the undefended ice cream realm. This crisis forges a direct link between her self-discovery and the kingdom’s survival, framing her personal growth against the backdrop of impending peril. The story traces her struggle to conquer self-doubt and harness her distinct abilities to shield her homeland.