After marrying a coworker and leaving her job, Rei carries a secret she has told no one: she was once the sex slave of her former boss, Matsuda. She thought his overseas transfer had ended their connection, but he never considered it over. Returning as her husband's new boss, Matsuda barges into their home and binds her body tightly with hemp rope. The stimulation revives pleasures she thought were buried, and she obeys his commands, surrendering to the rope as she takes his throbbing cock into her mouth.