Here is a look into the components of this specific animation and why it captured attention in 2021.
While specific "reports" on such files are rare due to their nature, the "2021" version generally refers to a specific project Hoshino worked on during that year. These animations are typically: Short Form: Usually ranging from 30 seconds to 3 minutes. High Production Value: shiinaecchigawarubyhoshinothefullanimat 2021