yurine, separated from her husband due to his infidelity and living apart with divorce in mind, returns home to inform her son about the divorce. her son, who has always had feelings for his mother, presses for a relationship, saying if she's going to divorce. she knows it's wrong, but can't look away. she knows she shouldn't, but can't refuse. the guilt of being a mother and the joy of being a woman clash. each time her son thrusts his hard cock into her, she reaches orgasm. she can't go back now... a taboo story of incest, opening the forbidden door and repeating their union.