"Soreike! Anpanman: Kirakiraboshi no namida" is a feature-length anime film based on the popular "Anpanman" franchise, which centers on the adventures of Anpanman, a superhero made of bread filled with sweet red bean paste. The story begins with Anpanman and his friends living peacefully in their world, where they protect others and spread kindness. However, their tranquility is disrupted when a mysterious star fragment falls from the sky, bringing with it a young girl named Kirakira. She possesses a unique ability to create sparkling stars but is burdened by a deep sadness that causes her tears to turn into dark, destructive energy.

As Kirakira struggles to control her emotions, her tears begin to threaten the world, creating chaos and endangering the lives of Anpanman and his friends. Anpanman, driven by his unwavering sense of justice and compassion, takes it upon himself to help Kirakira overcome her sorrow. Alongside his loyal companions, including Baikinman, Shokupanman, and others, Anpanman embarks on a journey to uncover the source of Kirakira's pain and find a way to restore balance.

The narrative explores themes of empathy, resilience, and the power of friendship as Anpanman and his friends confront various challenges, including battles with dark forces unleashed by Kirakira's tears. The story delves into Kirakira's backstory, revealing the reasons behind her sadness and the significance of the star fragment. Through their efforts, the characters demonstrate the importance of understanding and supporting others, even in the face of overwhelming adversity.

The film maintains the franchise's signature blend of lighthearted humor, action, and heartfelt moments, appealing to both children and long-time fans of the series. It reinforces the core values of the "Anpanman" universe, emphasizing kindness, courage, and the belief that even the smallest acts of compassion can make a difference. The resolution of the story highlights the transformative power of love and friendship, as Kirakira learns to embrace her emotions and find hope, ultimately restoring peace to the world.