One day off. Jun, who came to visit her house, fell in love with her mother Sayuri's ageless beauty and sex appeal when he saw her for the first time. Perhaps sensing Jun's feelings, Sayuri takes advantage of her daughter's chances and secretly tries to seduce Jun... Jun, who was obsessed with Sayuri's demonic nature and completely lost his reason, finally forgot that he was the parent of the companion and had a relationship with Sayuri. Since then, he pretends to have a home date with her and enjoys a secret meeting with his mother, Sayuri.