In her third year of marriage, Yui felt unsatisfied with sex only once or twice a month. Her beautiful body, unchanged since youth, remained unseen by anyone, and she began to feel like she was losing something. Her drinking gatherings with a single female friend from junior college became increasingly frequent. As her sexual frustration grew, she often found herself drinking too much. One night, she opened up to a man she had just met at the same gathering. Overcome by the urge to choose herself rather than wait to be chosen, waves of genuine excitement and nervous anticipation surged within her. Unlike her single friend, Yui deeply desired men who wanted her as a sexual partner, and she felt a true emotional connection with them.