Daisuke decided to live on his own, but shortly afterward, his father eloped with another woman. Witnessing his mother, Miyuu, struggling to endure the loneliness, Daisuke felt deep sorrow. Though he considered abandoning his independent life to stay with her, one day he caught sight of Miyuu masturbating, sobbing uncontrollably. The scene stirred intense emotions within him—his love for his mother and his sexual desire for a woman intertwined. These two forbidden feelings merged into one, ignited by Miyuu's heartbreaking, sensual vulnerability.