In 20XX, Japan introduces a practical romance program as its last hope of overcoming an unprecedented birth-rate crisis, choosing Kaguya Hime Academy as a government model school. The bold curriculum requires adult student role-players to practice romance and intimacy—in other words, sex. Hearing that participants receive extra academic credit and an advantage when applying for further education, Rika Tsubaki plans to join with her handsome boyfriend from another class. Only after signing the consent form does she learn that partners cannot come from different classes, and she is not allowed to withdraw. Instead, she is paired with the nerd she despises and, under an AI robot’s supervision, made to kiss him, suck his cock, have sex, and take his creampie.