Nain, who is great at her job and possesses a stunning appearance, longs for an intense romance with an older partner. Yet, those around her are consistently attempting to pair her with younger men instead… One day, like any other, Nain dozes off, consumed by her desire to date someone older. Suddenly, a peculiar doll emerges from behind her and rouses her from sleep! Identifying itself as the Queen of Succubi, the doll leads Nain to believe she is merely dreaming, prompting her to dismiss everything the doll says and fall back asleep. Infuriated by Nain's indifference, the Queen places a curse on her, condemning her to live as a vessel for lustful demons. From that moment forward, an extraordinary heat begins to surge within Nain’s body…!