JUX-772 Father-in-law's dirty teasing of his daughter-in-law. Father-in-law, please forgive me... Saryu Usui

Saryu is a wife living a happy life with her husband Keisuke. Her father-in-law Kazuo often comes to the Usui household to ask for money when Keisuke is away at work, but one day he witnesses an unbelievable sight. Saryu is being attacked by a door-to-door salesman. Kazuo manages to drive the man away and saves Saryu from peril. "Thank you for saving me, Father-in-law"... What were the unexpected words that Kazuo said to Saryu, who was filled with gratitude?