Ivan is a guardian robot in charge of teaching the orphanage kids what they need to know in order to succeed in the enormous world. Ivan has taken care of Rau for many years, but they’ve suddenly become estranged recently. Rau’s maturation into an adult has also resulted in bodily changes, emotional swings, and impulsive cravings. Ivan offers Rau a birthday request, desperate to reconnect their bone before Rau’s upcoming departure. The issue is that Rau’s most passionate desire is to receive sex instruction from Ivan. Whether Ivan accept Rau’s wish?