SSNI-923 Hiyori Yoshioka, a sailor girl who was forced to have perverted sex for a year until graduation by her homeroom teacher, whom she hated.

When Hiyori is 18 years old, the new school year begins and the teacher she hates to death becomes her homeroom teacher. - The way he looks at himself is disgusting and he's the worst. - My teacher asked me to organize the library, and while I was working on it, I started to feel half-conscious. - In fact, her water bottle was laced with sleeping pills. - She is forced to sleep and raped while being filmed by her creepy homeroom teacher... From that day until she graduates, Hiyori becomes her homeroom teacher's toy and is forced to engage in various perverted sex acts. - A record of an old teacher who devours young bodies in spring, summer, fall and winter.