'Mona' decided to take care of 'Osamu', her husband's father. Osamu was also pleased because she had been entrusted to her housekeeper 'Shiori' until now. She thought that her happy days would pass, but she finds out that her husband and Shiori are having an affair. Mona has become emotionally unstable, but while taking care of Osamu, she begins to have special feelings for Osamu...
