Toa became the second wife of the Nanashima family. Although her relationship with her husband was good, she was not able to open up to her teenage stepson Masato and there was some tension between them. Then her husband went on a company trip. She was forced to be alone with Masato and struggled to get along with him despite her anxiety. But Toa's voluptuous body and defenseless charm drove Masato crazy before he knew it.