Kana, a career woman working as the sales manager at a trading company in Tokyo, is stressed by the excessive expectations of her company, her heavy workload, and misunderstandings with her husband. She's also troubled by her relationship with her incompetent subordinate, Yoshino. One day, when Kana gets drunk and shows weakness, Yoshino pins her down, revealing her hidden masochistic nature. Then, during his lunch break, Yoshino calls Kana to an SM hotel, where he plays with his boss, who is dignified at work, and turns her into a submissive, masochistic woman who finds pleasure in pain...