After my husband came to work, I was always alone with my father-in-law...

Asahi lives with her kind husband, Koichi, and her father-in-law, Haruo. His father-in-law, Haruo, was kind to Asayo and told him that he wanted to see his grandson soon. However, when Haruo learns that his husband and wife are unfulfilled and Asahi is not satisfied one morning, he attacks Asahi, who has seen Koichi go to work... Then, when they are alone every day, Haruo repeatedly commits obscene acts. As these days continue to occur, Asahi awakens to the pleasure that Koichi could not have achieved...