A young girl who was abandoned by her mother when she was little and was entrusted to an institution had only a bear stuffed toy called "Kuni-chan" that her mother gave her when she parted with her. One day, the girl who was supposed to be taken in by her uncle's house reported to Kuni-chan, "There will be an increase in the family!" The perverted man next door puts a wiretap on his stuffed toy and finds out that his uncle is playing pranks on a girl every night, so he threatens his uncle and proposes to play with him.