Shigeru, the grandson, harbored intense sexual feelings toward his grandmother. One day, after secretly watching her bathe, he could no longer resist and decided to act on his desires at night. Sneaking into his grandmother's futon, he held his breath and began touching her intimate areas. His caresses aroused her, and she eventually accepted his fully erect cock. A shocking encounter unfolds as Shigeru's lust intertwines with his grandmother's response.