Ten-year-old Takuya has a new job: to look after his baby brother Minoru…looks like it’s time to put on the kid gloves! Young Takuya has it tough. Since his mother passed away, he’s had to take care of his baby brother Minoru while their father works the long hours of a Japanese salaryman.

When Takuya’s friend Hitoshi finds a strange woman’s photo in his father’s cookbook, he panics. Could his ultra-feminine dad really be having an affair? But Hitoshi’s problems are just beginning, as an innocently dropped handkerchief leads him to a gang of bank robbers, a secret code, and more. Before they know it, Takuya and his friends have been kidnapped, and it’s up to Hitoshi’s dad–with a little help from Minoru–to save the day!