Her father-in-law recently bought a house. However, as his legs have weakened, he is struggling to adjust to life in his new home. Rin, unable to bear seeing him like this, is concerned about him and frequently comes to help him. One day, while working on a stepladder, he loses his balance and falls on Rin. And with his unconscious daughter-in-law right in front of him, he commits adultery... Rin feels a strange sensation in her body and is confused, but her father-in-law, having sucked her innocent nectar, continues to run wild. Rin's body, which her young husband cannot satisfy, is invaded by her father-in-law with sticky kisses and caresses. Before she knows it, her father-in-law's close embrace is like a vine, tethering the young bride's body to him...