Shinobu has raised his only son, Mitsuo, with just one female hand. - She was struck by her work because of the "busy season" during both New Year and Golden Week, and she made Mitsuo feel lonely. - One day ... The season is October when Shinobu's work is free. - He was able to take a relatively long break, and he was thinking about doing something with Mitsuo to destroy his sins, but he was wondering what to do. - Mitsuo told me that there was an event called Halloween in October ...