Sigel, whose body is weakened and needs care, lives with her sons 'Tamaki' and 'Toshifumi.' Sigel, who tends to fall into a distressed body, witnesses the sex of one day's son and wife, where he realizes that his things will rise. Sigel, who pretends to be a frail old man and erotic acts, and Tamaki, who can't refuse it, will eventually.