"Soreike! Anpanman: Dokin-chan no Dokidoki Calendar" is a feature-length anime film based on the popular "Anpanman" franchise, which centers on the adventures of Anpanman, a superhero made of anpan (a sweet bread filled with red bean paste). The story revolves around Dokin-chan, a cheerful and energetic character who loves calendars and timekeeping. Dokin-chan discovers a magical calendar that allows her to travel through time, leading to a series of whimsical and heartwarming adventures.

The narrative begins when Dokin-chan finds a mysterious calendar in the forest. Upon touching it, she is transported to different points in time, including past and future events. Her time-traveling escapades bring her into contact with various characters from the Anpanman universe, including Anpanman himself, his friends like Baikinman, Shokupanman, and others. Each time period presents unique challenges and lessons, often tied to themes of friendship, kindness, and the importance of cherishing moments.

As Dokin-chan explores the calendar's powers, she inadvertently disrupts the natural flow of time, causing chaos in the world. Anpanman and his friends must work together to restore balance and help Dokin-chan understand the responsibility that comes with such a powerful tool. The story emphasizes the value of teamwork and the joy of living in the present, as the characters navigate through humorous and touching situations.

The film maintains the lighthearted and educational tone characteristic of the "Anpanman" series, appealing to its young audience while delivering a simple yet engaging plot. Dokin-chan's curiosity and enthusiasm drive the story forward, while Anpanman's unwavering kindness and heroism provide a moral anchor. The time-travel element adds a layer of creativity, allowing for imaginative scenarios and interactions between the characters. Overall, the film serves as a charming addition to the "Anpanman" franchise, blending adventure, humor, and life lessons in a way that resonates with its target demographic.