Fastening Days

In a not-so-distant future, siblings Yoji and Kei live a seemingly ordinary life with their foster parent, Anna, in a quiet town. However, beneath their everyday facade lies an extraordinary secret: the pair are dedicated protectors of their community. Balancing the challenges of childhood with their heroic duties, they navigate the complexities of life while guarding their home from unseen threats.

Armed with innovative inventions and aided by their quirky robot bear companion, Oscar, Yoji and Kei take to the skies, ready to defend their town against looming dangers. As they face unexpected challenges, their bond and resourcefulness will be put to the test. Can these young heroes rise to the occasion and preserve the tranquility of their beloved home?