Mayu Onodera is a married woman living with her husband, who suffers from obsessive cleanliness. Their marriage lacks passion, with almost no kissing or foreplay, leaving her deeply unsatisfied. One day, her company's new recruit, Keisuke, is invited to a welcome party at her home, and Mayu frantically prepares for the event. After drinking too much, she becomes intoxicated and begins voicing her frustrations about her husband, eventually blurting out, "Why doesn't my husband ever kiss me...?" Hearing these words, Keisuke impulsively kisses her on the lips. From that moment on, the scorching kiss lingers in Mayu's mind, and their relationship begins to change drastically. A story of a woman breaking free from her dull married life and stepping into a new, passionate romance.