After her husband is transferred overseas, Misa begins living alone with her son, Junji. However, their relationship is far from ideal, as Junji rarely speaks to her. One day, her cousin Tamio comes to stay at her house for several days. With his lively and cheerful personality, Tamio helps Misa gradually start having more conversations with Junji. But Tamio grows increasingly interested in Misa, secretly staring at her legs and buttocks, and repeatedly asking Junji questions about her, showing clear signs of prying into her private life.