A couple desperately wants a child, with the husband being particularly obsessed with becoming a father. However, it is discovered that the husband has azoospermia. Knowing how much her husband wants a child, the wife cannot bring herself to tell him the truth. She makes a decision... to receive a sperm donation from her husband's junior, who has strong sperm, to pass the child off as her husband's. Moved by the wife's sincere feelings, the junior accepts this unbelievable request. After much trial and error, the wife eventually becomes pregnant. The husband is overjoyed, and seeing him this way, the wife feels relieved. However... the wife and the junior continue to meet in secret even after the pregnancy. Was the action the wife took truly a happy decision for the couple?