So Low

A pair of cunning, prank-loving twin sisters are about to enter a spiral of corruption orchestrated by their own middle-aged tutor! Behind their polished facade as serious high school students, the crafty elder sister Kasumi and her clumsy younger twin Mitsuki begin undergoing perverse “discipline sessions” under the guise of behavioral training.

Despite the sisters constantly pulling devious tricks to get rid of their new live-in guardian, the experienced older man uses every manipulative trick up his sleeve to drag both of them into endless waves of pleasure. Forced into submission, Kasumi experiences the overwhelming, intimidating dominance of a mature man for the very first time. Determined to protect her innocent younger sister from his traps, Kasumi resolves to bear the brunt of every touch and punishment herself.

The sly, upper-class young lady who once confidently toyed with men in the palm of her hand must now bitterly endure humiliating degradation, completely breaking under pure physical instinct…