A year after losing her husband… With her daughter, Mikoto, also married and living alone, the only joy in Miku's life was the occasional conversations with her son-in-law, Daichi. However, as Miku began to see Daichi as a man, she couldn't suppress the urge within her heart and ended up giving herself to him. Their relationship changed drastically after crossing that line, and every time he visited, Miku became obsessed with Daichi's intense affection. But one day, Mikoto grew suspicious of their behavior and came home…
