Story
ONA — Winter 2021, 24 episodes, Finished.
The anime's release celebrates the character's "birthday" as a stamp character for the LINE messaging service. The character is a hamster that came from space. (Source: Anime News Network) Note: All 24 episodes were first available for free in the Manga ONE app and on the official Kusohamu-chan YouTube channel for 24 hours.
Synopsis via AniList (English).