Private Corondo Girls' Academy is a prestigious ladies' school renowned throughout the country. However, even though the law mandates sexual intercourse, sex education at this elite academy for young ladies is severely outdated and lagging behind.

Into that refined school for young ladies arrives the newly appointed sex instructor, Kobayashi. His official duty is to impart correct knowledge and proper sexual techniques to the girls. But this sex instructor, using "guidance" and "instruction" as his excuse, proceeds to fuck the girls one after another...