Living in a bleak and empty daily routine, Rina, a mother who drowns herself in alcohol and sex, shares a strained existence with her only son, Ryoichi. With no father around, Rina bears the entire burden alone, barely surviving on a meager income, while their lives grow increasingly dark and desperate. Ryoichi finds himself tormented by his beautiful mother's seductive presence, losing grip on his own sense of self. Amid suffocating despair and anxiety, a deep, forbidden bond begins to form between mother and son, giving rise to a taboo relationship. What awaits them at the end of this twisted path unfolds into a gripping tale that captivates the audience.