This was the first attempt at an animated adaptation of Hamtarou, and consists of four short episodes. Crawling Around, Hamtarou (ドラマ ~ もぐりこんだら ハム太郎): Natsumi comes home and finds Hamtarou is missing from his cage. Shortly after, Hamtarou is revealed to be hiding under Natsumi's blanket, where he...

Source: MyAnimeList