Six months after Hitomi and Sho, who both lost their parents, got married. The two decided to live with Sho's grandfather, Hiroki, but just when things seemed to be going well, they are struck by misfortune when Sho dies in a traffic accident. Hitomi, grieving in sorrow... Perhaps because of that loneliness, she ends up having a physical relationship with Hiroki. Hitomi, tormented by her guilt, decides to live with Hiroki. But at that moment, Kenta, her husband's father who she thought was dead, returns...
