Odc. 4: Mizuki przyjmuje zlecenie opieki nad psem starszej pani i jej shiba inu Umetą na wsi.

4

A young woman named Mizuki starts a petsitting business. Her first client is an old woman who lives in the country with a Shiba inu named Umeta that she'd found abandoned, but lacks the strength to walk him herself. Out of pity for Umeta, and for the generous pay, Mizuki accepts the job. One evening, she is approached by a detective who asks her about a rash of illegal corpse disposals in the area, and warns her against staying out late. She informs her employer, who offers to let her quit for her safety, but she decides to stay on. She continues the job for several weeks, until on one of the walks, she trips over a hand protruding from the dirt, and screams. Her employer approaches her, holding a kitchen knife, and she panics; suddenly, with a chomping sound, the old woman is being dragged away. The police arrive and find the old woman's corpse, but not Umeta; Mizuki is convinced Umeta saved her life. When she arrives home, she finds Umeta waiting for her at her doorstep, and greets him warmly. That night, Umeta is burying something in a park... (Source: Wikipedia)