An adult son is stunned to learn that the woman his father plans to marry is Ayumi, the nurse who was his first love during a long hospital stay. She was the reason he endured those dull days in bed—and the fantasy he masturbated to again and again. He is happy to have her in the family, but jealousy consumes him when he realizes his father will come first. Refusing to see her as his mother, he decides to claim her as the woman he has always wanted.