Shinobu, a single mother, has been raising her only son, Mitsuo, all by herself. Even during New Year and Golden Week, she was called to work due to the 'busy season,' leaving Mitsuo feeling lonely. One day... the season turned to October, when Shinobu's workload lightened up. She decided to make it up to Mitsuo for past neglect and wanted to do something with him, but she couldn't decide what to do. It was then that Shinobu heard from Mitsuo, 'There is an event called Halloween in October.'
