Ayako, who divorced her husband a year ago, explained the reason to her husband's affair and friends around her, but in fact there was a real reason that could never be said to anyone. It means that he has fallen into a physical relationship that goes beyond the relationship between his son, Satoshi, and his mother and son, which is absolutely unforgivable. Moreover, Ayako does not try to break this abominable relationship, but rather tries to deepen it, and as long as time permits, she overlaps her lips with Satoshi and entangles her tongue and continues to sway immorality.