Kana is a successful sales director at a Tokyo trading company, but relentless expectations, overwork, marital distance, and an incompetent subordinate named Yoshino leave her under crushing stress. One night she gets drunk and exposes her vulnerable side; Yoshino pins her down and discovers the masochism she has kept hidden. From then on he summons her to an SM hotel during lunch breaks, turning his normally proud and composed boss into an obedient submissive who finds pleasure in pain and twisted discipline.