Karen, a popular leader among both customers and staff for her bright personality, finds Mai, a gloomy girl with glasses, timid and unassuming, cute and teases her on a daily basis... but the plain girl's true identity is a carnivorous monster with a hunger for women! Unable to resist, the true nature of the shady woman attacks Karen's beautiful slender body! Karen's lewd tongue writhes and entangles her ferociously, making her cum so much that she regrets it when the roles are reversed, and she is consumed by her runaway, limitless sexual desire...