While talking to my son on the phone...

Natsuko has raised her son Noboru single-handedly. Natsuko was working hard at her relative Ozawa's company, but the person who supported her was Hanaoka, a trader. One day, after work, Natsuko receives a call from Noboru, who is meeting with Hanaoka. Natsuko answers the phone while being groped by Hanaoka, and then she realizes that today is her birthday... A week later, it's Noboru's birthday, which we promised to celebrate together. However, this time he is stopped by Ozawa...