Ms. Tsumi is playing the role of a serious teacher while secretly engaged in a forbidden relationship with one of her students behind closed doors. However, recently, the student has been openly pursuing their relationship within school grounds... This could lead to disastrous consequences if discovered; not only would she lose her position as a respected teacher but also her reputation as a married woman. Despite trying her best to resist, Ms. Tsumi finds herself unable to fight back against his touch due to her sensitive body. She tries desperately to remain silent during their intimate encounter, hoping that at least her voice won't betray them. In the end, despite her efforts, her moans escape into the quiet corners of the school building, signaling her climax under the cover of darkness.

友美は真面目な教師を演じながら裏では教え子と禁断の関係を結んでいた。だが最近、教え子が校内でも関係を求めてくるように…。それは発覚すれば教師としても人妻としても立場を失う危険な行為。ここではダメと友美は必死に拒絶するが、愛撫されると力が抜けてしまう敏感ボディでは抵抗もままならず…。せめて声だけは出ないように。校舎の片隅で漏れ出す嬌声を必死に抑えて友美は無言のまま昇天する。