Akihiro has always lived in the shadow of his older brother Takahiro. When he was younger, he was introduced to his brother's girlfriend, Hisane, and fell in love at first sight. Hisane and Takahiro get married, and while they have a good relationship, their sex life is a little lacking.

One day, Akihiro discovers a smartphone hypnosis app, and decides to try it out on Hisane. The hypnotized Hisane believes that he is her husband Takahiro and begins pestering him for sex, so he embraces her per her own desires...