Aika remarries Kazuhiko, who has a stepchild, and becomes the mother-in-law of Naoya, the only son of his age. Her shy Naoya doesn't open her heart no matter how much Aika talks to her. One day, Aika sees Naoya being bullied by her classmates and heads to his room. And when she started talking about her classmate, she was raped by Naoya who was furious. A secret event that shouldn't have happened. However, Naoya tells his bad friend about his relationship with his mother-in-law.
