
Fastening Days was released to modest attention and a mixed critical reception. Upon its debut, audiences appreciated the charming dynamic between Yoji, Kei, and their robot bear sidekick Oscar, as well as the imaginative high-tech gadgets they used. However, some critics found the plot somewhat simplistic and the futuristic setting underdeveloped, which limited its initial impact. Over the years, the series has cultivated a dedicated fan base who appreciate its nostalgic animation style and heartfelt storytelling. It is now regarded as an underrated gem, cherished for its warmth and creativity even if it never achieved mainstream blockbuster status.