Karen — bright, popular with customers and staff alike, a leader figure at work — found the timid, nervous manner of Mai, a plain, mousy girl in glasses, cute, and had been teasing her for a while... But the mousy girl's true identity was a carnivorous, insatiable monster starving for female flesh! The true nature of the "shadow girl" who can't hold back any longer attacks Karen's beautiful slender BODY! With a ferocious, writhing, entwining obscene tongue, the roles reverse and she's made to cum over and over until she regrets it, swallowed up by a runaway, endless lust...