His mother, Sayuri, who runs a knitting class, liked his son, Tatsuro. She is a mother who smiles sweetly and knits with smooth hands. However, Tatsuro was dissatisfied that her friend was learning to knit from her mother. One day, when Tatsuro goes to his friend's house to pick up his mother who is teaching her how to knit, he sees the two of them groping each other in an abnormal way. And Tatsuro, who can't control his jealousy of his friend and his desire for his mother, pretends to be his friend and hugs his mother from behind...
