Hentai protagonist Akane has been married for almost three years and desperately wants to have children. However, because of her hard work, her husband hardly touches her and the last time they had sex was more than half a year ago. Soon Akane learns a terrible truth. It turns out that her husband is having an affair with a young girl who is prettier and slimmer than she is. Akane couldn't confide in anyone, so she decided to vent her feelings on social media as a so-called "Sarewife" who was betrayed by her husband and cheated on with a younger woman.

She couldn't confide in anyone, so she distracted herself by posting on social media about her feelings as a so-called "Sarewife.

One day, a friend recommends a new yoga studio in her neighborhood, and to get her mind off her bad thoughts, she decides to give it a try.

The instructor, Hayakawa, is a very attractive man who is popular with married women.

Akane is proud of her chastity and straightforwardness and despises the thought of cheating on her husband, so she is not attracted to him at all.

But after a while...

Hayakawa pretends to be close to Akane's problems and shortens the distance between them, but Akane doesn't realize it... .... He fumbles with his hands and disturbs Akane's peace, and gradually her desire for sex grows. It's not cheating, she tells herself....