The year is 2120. - With advances in AI technology and robots doing everything for us, we are now in an era where humans can live a rich life without having to work much. - Haruna and Natsuki, a newlywed couple, have installed the latest humanoid AI robot, Otetsu-kun, in their house. - On the first day, Otetsu-kun sees through Haruna's frustration and helps Haruna deal with her sexual desires when Natsuki isn't looking. - At first, Haruna hates it, but eventually she becomes honest about her desires and falls in both body and soul...