I have been married to my current husband for several years, and in my happy life, I had only one problem. It is a relationship with her husband's stepchild, Yuzuru. Since Yuzuru got married at the time when he moved to Tokyo, only time passed awkwardly. My husband, who couldn't see the relationship between me and Yuzuru-kun, was attentive and called Yuzuru-kun to his parents' house during this summer vacation. I was trying to deepen our relationship as a family and as a mother, but my husband went on a business trip the next day. I'm alone with Yuzuru-kun ...