After returning home after a long absence, the granddaughter had grown remarkably. As the elderly grandfather allowed her to wash his back, an innocent and beloved presence, his aged cock suddenly rose fully erect for the first time in twenty years. Though initially reluctant, the granddaughter, remembering her womanly nature, gently accepted her grandfather. The grandfather's weathered cock thrust deeply into her tiny, cherry-blossom-like bud. In that instant, a new emotion bloomed, deepening their relationship forever.