Shizuko Amagi, who just moved into a new apartment, adopts a stray cat and names it Muru. She begins to receive prank calls, items she did not order delivered to her house, and threatening letters, warning her to throw out the cat. With a private investigation agency, she discovers that it is her neighbor, Kyoko Tachibana, sending threats. She posts a letter to Tachibana, apologizing and saying she will move out as soon as she can. Later, she finds Muru gone, with a bag filled with meat outside. Thinking it is Muru, she sends Tachibana to hell. It is revealed that the cat belonged to Tachibana, who was upset that Amagi adopted it, but never thought of simply talking it out with her. Amagi discovers Muru alive and well, the bag of meat being nothing but another prank.