Private Corondo Girls’ Academy (also spelled Corond or Colondo) is a prestigious all-girls elite school known for producing refined young ladies. Despite a national law that mandates sexual intercourse, the academy’s sex education is severely outdated and lacking. A new sex instructor named Kobayashi is hired to teach proper sexual knowledge and techniques. Officially, his role is educational “guidance,” but he quickly abuses his position and authority to seduce and have sex with the naive schoolgirls one after another.