Due to financial difficulties at her husband's company, he is forced to relocate alone to a remote area for work. To support the family, wife Yume must re-enter the workforce and finds a new job where her supervisor turns out to be her former teacher, Kunishima. He had previously engaged in a physical relationship with Yume and continues to impose sexual "instruction" on her during work hours. Yume is compelled to obey his commands, enduring daily humiliation while recalling past experiences and finding it increasingly difficult to suppress her own sexual desires. Gradually, she becomes immersed in the pleasure derived from submission, growing ever more dependent on his control.