One day, while visiting her family home for a grave pilgrimage, she unexpectedly reunites with her former teacher from school days. They hit it off and head to a bar, where things escalate and they end up spending the night together. He has a passion for tight bondage, and mei, experiencing it for the first time, is surprised by this new pleasure and quickly becomes addicted to the sensation. Afterward, she tries self-bondage and masturbation, but finds herself unsatisfied. Taking advantage of her husband's business trip, she plans a two-day, one-night affair with her teacher. A new relationship begins.