Finally, the K-cup busty actress Marina Yuzuki is finally allowed to tie up with hemp rope! Marina, a novice housekeeper who was introduced to a lawyer's house by a housekeeper dispatch agency, becomes interested in the underground safe room that is off-limits to the public and enters it. There, she discovers old books and props related to SM, and becomes extremely excited, her groin gets hot. Nikaido, who is watching this on the security camera, plots to give Marina a taste of rope in order to protect his secret...