In front of her beloved son, a mother writhes and sobs, caught between shame and pleasure in an intensely realistic portrayal. Mio has been engaged in a secret relationship with her son, Yuuji, but one day she reads a confessional letter in a magazine from another mother living the same taboo life, which shocks her into wanting to end their affair. However, Yuuji refuses to let go of Mio's body and continues to pursue her heart and flesh relentlessly. This story deeply explores the turmoil of love and guilt, familial bonds and betrayal, evoking powerful emotional waves in the viewer.