Even though Aika is a teacher, she secretly has a relationship with one of her students. She enjoys their secret encounters after school, but the desires of the hotheaded and Kokoro young man escalate quickly. Eventually, he begins to ask for a relationship inside the school as well. In a blind spot in the school with other students nearby, the student's penis is forced into Aika. Aika desperately tries to suppress her voice, knowing that if she is found out, her teaching career will be over... The stimulating love affair in school awakens Aika's true lewdness, which she has been hiding behind the mask of a teacher.