The narrative commences in Anpanman World, where everyone is busily preparing for the yearly Star Festival. During the event, an egg emerges from Baikinman's trash can and hatches to reveal an enigmatic boy named Kurun. Despite not knowing his origins, Kurun enjoys his time playing with everyone. However, their joyous days end as black stars begin to shower down. Anpanman senses something fishy going on at the Star of Life, thus he decides to investigate.