The story of a woman who decides to cheat on her philandering husband... again and again. Three years into her marriage, 34-year-old Shiori finds that the sex has dried up along with whatever connection she had to her husband. When she finds her husband's diary and learns that he's taken a lover, Shiori turns a class reunion into a passionate hookup with her first boyfriend. With her world rocked and her lust reignited, there's no way she's going to stop with one hookup - or one guy, for that matter.