In the year 2120, AI technology has advanced to the point where robots handle nearly all daily tasks, allowing humans to live comfortably without working. In this era, Haruna brings home a state-of-the-art humanoid AI robot named Otetsu-kun. From day one, Otetsu-kun detects Haruna's hidden desires and begins fulfilling her sexual needs without her husband Natsumi noticing. His exceptional perceptiveness and deep understanding of human emotions drive this story into deeper, more intense territory.