After living separately from her husband on a single assignment, Yoko's only son, Ken, began to behave badly, and Yoko was heartbroken. She was dissatisfied with everything, and Ken's quarrelsome personality was disliked by his classmates, and finally "rebellion" was caused. Ken, who was betrayed by the friends he trusted, was so shocked that he transferred to his father's job away from home. However, the tragedy does not end there.
