Teacher Itsuki visits the home of her student Kenta, who has been refusing to attend school in her homeroom class. The school had abandoned Kenta after he caused trouble on campus, but she made the decision against the objections of her fiancé, a fellow teacher. However, Kenta welcomes her in, makes her drink tea laced with a sleeping drug, and then forces himself on her. Furthermore, his yakuza older brother Dango and his underlings appear during the act, and Itsuki ends up being gangbanged.
Driven by a desire to defile her refined, beautiful face, they corrupt her pure and principled heart into a masochistic slut. Her fair-skinned, beautiful body writhes as she is made to cum repeatedly. Unrescued by anyone, she is gangbanged by delinquent students, penetrated by multiple vulgar cocks, and inseminated. Covered in semen from head to toe, transforming into a sex slave, she mutters, "If my pussy is fine, do as you like..." Eventually, she degrades herself, saying, "I'm a useless teacher who gets creampied by her student's family," and whispers, "I'm no longer a stranger to you..."