Ryoko married Sadao and became the mother of his stepchild, Mikio. Mikio was always confined to the house, and Ryoko was at a loss as to how to deal with him. Then one day, Ryoko consulted Sadao about sending Mikio to a rehabilitation facility. However, Mikio overheard their conversation and began to hate Ryoko... Then, when Sadao went on a business trip, Mikio took Ryoko's clothes and forced her to live naked. He even used his friend to further humiliate his stepmother, who was embarrassed by being naked...