Atsuko (Mina Hoshino), who is living a newlywed life with her husband Hidehiko. However, her father-in-law Shozaburo has not spoken for three months, and Atsuko was worried. One day, when such a Shozaburo made a lewd request of Atsuko just once, she could not refuse and accepted it. Then, Shozaburo revealed his true nature and attacked Atsuko. From that day on, he repeated obscene pranks every day, and invited the old men from the senior citizens' club to toy with Atsuko. And then, Nanko (Mao Hamasaki), Atsuko's sister who came without knowing anything, also caught Shozaburo's eye...
