The Boundary of Immorality: The Ura Side ♥ of the Female Teacher

Kisaragi Miyuki is a high school teacher known for her stern, unapproachable demeanor in the classroom. She maintains a strict, professional distance from her students, who see her as cold and humorless.

Rumors circulate, however, that her private life reveals a completely different personality—that of a clumsy and absent-minded woman. This contradiction catches the attention of Miwa Itsuki, a student with a problematic desire to tease women who exhibit such flaws. When Itsuki encounters his teacher outside of school, his sadistic impulses are ignited.