A few years after marrying my current husband, there was only one worry in our happy life. That was my relationship with my husband's child from a previous marriage, Yuzuru. We got married just as Yuzuru was moving to Tokyo, so time passed with awkwardness. Unable to bear the relationship between me and Yuzuru, my husband was thoughtful enough to invite Yuzuru to his parents' house this summer vacation. I was trying to deepen our relationship as a family and as a mother, but the next day my husband went on a business trip. I was left alone with Yuzuru...