Nanako Matsutaka is a student. She is a virgin. And she is in love with senior student Komugi. Because of all these circumstances, fate led her to the seminar of the ominous Professor Messiah, "Physiology of Deviants." For the scientific supervisor, modest Matsutaka‑kun is an ideal control subject—a tabula rasa—and on the first day of creation, all her classmates" deviations—from exhibitionism to coprophagia—stand out in especially bright colors against her backdrop.