A widow named Aoi mourns her late husband's passing in a car accident. After the funeral, his father Taketo forces her into a difficult decision. He tells her that since they have no children, there's no reason for her to stay at their home anymore. As she trembles, he proposes something else - if she becomes pregnant with his son's child, then she can continue living in the Smallz family, preserving their bloodline. That night, filled with inner turmoil but determined not to lose her place within the family, Aoi decides to go to Taketo's room...