Several years into marriage, Ms. Mori enjoys a stable relationship and a peaceful life with her husband, yet she has begun to feel that something is missing. When a younger male employee joins her company, she is assigned to train him. Spending time together awakens her mischievous side, and after drinking at his welcome party, they cross the line. That forbidden encounter ignites all the desire she has suppressed, driving her to seek even stronger thrills by coming to the producers.