ギャンブルにハマる夫と冷めきった関係のコンビニパートのえまは、シフトがよく被る年下同僚・黒井からのアタックに罪悪感を抱きつつも、嬉しさと日頃の寂しさから受け入れしまう。若さと性欲を持て余らせた黒井との情熱的な不倫セックスに溺れたえまは肉欲の日々にどんどん堕ちていくのであった…。
Ema, a part-time worker at a convenience store, has a cold relationship with her gambling-addicted husband. Although she feels guilty about the advances of her younger coworker Kuroi, who often shares the same shift as her, she accepts them out of joy and her daily loneliness. Ema, who is young and full of sexual desire, becomes addicted to passionate extramarital sex with Kuroi, and falls deeper and deeper into the days of carnal desire…