The whole story of how she meets an old man who likes rope, gets tied up, trained, and becomes a rope slave! Yui, who is looking for a sugar daddy, breaks up with her current daddy and meets her new daddy, Ichijo. Ichijo is an old man who likes bondage. He asks her to tie him up, and Yui reluctantly agrees. She gets very excited when she is tied up... Yui becomes obsessed with the charm of rope, and her body becomes unable to be satisfied without rope.