Aoi, who raised her only son all by herself, was happy to hear he recently found a girlfriend. However, with this new relationship, her son began rapidly distancing himself from her, leaving Aoi feeling lonely and abandoned. Though she always knew this day would come and had mentally prepared for it, in this moment, a powerful desire to stop him from leaving her has awakened. Her affection, once nurturing, has now grown into an overwhelming, obsessive love.