This role-play is performed by adults. A healthy beautiful girl who loves a pervert and brutal teacher and responds to his vulgar acts with a smile as he is ordered. Their daily life is an immoral mistress relationship where they engage in perverted acts inside the school. Yura, a plain and serious student, has a physical relationship with Asano, a teacher, that neither teacher nor student knows about. Asano escalates his behavior day by day, forcing her to perform vulgar and obscene sex acts, including covering her eyes. Their bold and dirty relationship, which they are willing to reveal to their colleagues and students, continues today.