In 20XX, Japan launches a practical romance program as a last-ditch response to the birth-rate crisis, selecting Kaguya Hime Academy as a government model school. Participants earn extra academic credit, so Rika Tsubaki plans to join with her handsome boyfriend from the next class—only to learn that partners must be classmates. Already signed up and unable to quit, she is paired with the awkward nerd she despises. Under an AI robot's supervision, the adult student role-play pair must kiss, perform oral sex, and finish with creampie sex.