"Chi's Sweet Home: Chi to Kocchi, Deau" is a short anime series that serves as a prequel to the main "Chi's Sweet Home" storyline. The narrative centers on Chi, a curious and playful kitten who becomes separated from her mother and siblings. Lost and alone, Chi wanders the streets until she is discovered by a young boy named Yohei Yamada and his family. The Yamadas, who live in a pet-restricted apartment, initially hesitate to take Chi in but are quickly charmed by her innocence and decide to care for her temporarily.

The series explores Chi's early days with the Yamada family, highlighting her adjustment to her new environment and the challenges of keeping her presence a secret from their landlord. Chi's playful antics and curiosity often lead to humorous and heartwarming situations, as she navigates her new life indoors. The Yamadas, particularly Yohei, grow increasingly attached to Chi, forming a bond that underscores the themes of family and companionship.

Throughout the episodes, Chi's interactions with the Yamadas and their neighbors provide insight into her personality and the dynamics of her new home. The series also touches on Chi's longing for her mother and siblings, adding emotional depth to her journey. Despite its brevity, "Chi's Sweet Home: Chi to Kocchi, Deau" effectively sets the stage for the main series, offering a glimpse into the origins of Chi's relationship with the Yamadas and her transition from a stray kitten to a beloved family member.