Incest job hunting mother

Seiko has been divorced and has been raising her son, Haruhiko, on her own. One day, Seiko is told that she will be fired from the company she has been contracted with for many years. Seiko was worried alone, but Haruhiko questioned her about her strange behavior... For the sake of her beloved son, Seiko decides to ask about her former boss, Sugiura, because she can't keep mourning forever. Although Seiko was struggling with the turmoil of the world, she was finally able to get a job offer, but the working environment at the company was far worse than Seiko had imagined...