Mirei, a housewife who lives with her husband and daughter. Even though he lived a comfortable life, he had an affair because his husband and his night life were estranged. One day, Mirei accidentally discovered a video in which her son-in-law, Yoshikazu, appeared at a love hotel. Mirei intends to snoop on the truth for her daughter, but on the contrary, she becomes aware of her affair. Yoshikazu forcibly asks with a young Ji Po, "If you want to have an affair, let's do it with me!" Yoshikazu's lust does not stop for Mirei who has beautiful skin and abundant big tits while being a mother-in-law, and the two continue to have an affair at home in the swamp.