Ayaharu is living an ordinary but happy life with her husband and son who has become a member of society. On the other hand, Toyama, who his son was close to during his student days, has feelings for his friend's mother, Ayaharu. Even as job hunting began and days passed without seeing each other, that feeling not only faded, but turned into a twisted obsession. Toyama visits Saiharu to finally make her his own. Without any warning, Saiharu's peaceful daily life came to an end.
