You can become a real family even if you're not related by blood. Or so she believed... Sayuri married her husband who is much older than her. She thought she could build a happy relationship with her husband's stepchild, Tatsuya, because they were close in age, but soon Tatsuya began to press her, saying that he wanted to be in a relationship with her, not as a family. A woman's heart is troubled by this unexpected confession. Then she finds out that her husband will be away on a business trip for a week...